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GMC News: 2019 GMC Sierra Begins to Differentiate Itself

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The Chevrolet Silverado and GMC Sierra really don't have many traits that set them apart, aside from different front-end styling. But GMC is hoping the new 2019 Sierra, making its debut today, will be able to distinguish itself from its Chevrolet brethren. 

To do this, GMC has two new features that are exclusive to the Sierra. First is the CarbonPro bed. Optional on the Denali, the bed is comprised of lightweight carbon fiber composite panels for the inner panels and floor. Not only does it promise "best-in-class dent, scratch and corrosion resistance", it also drop 62 pounds out of the Sierra's curb weight. Second is the MultiPro Tailgate that offers "six unique functions and positions
" such as standing workstation.

The Sierra's exterior takes a bold approach with a larger front grille and C-Shaped headlights. Denali models appear to have a lot of chrome trim. 22-inch wheels are standard equipment on the Denali and SLT. We don't know much about the exteriors for lesser Sierra models as GMC is focusing on the Denali and SLT models for the time being.

Like the Silverado, GMC has focused on cutting weight in the 2019 Sierra - up to 360 pounds depending on the configuration. Aluminum panels are in use for the doors, hood, and tailgate. 

Don't expect any drastic differences between the Sierra's and Silverado's interior aside from some additional chrome trim. The Sierra does come with some interesting tech including a full-color heads-up display, a trailering smartphone app that allows a driver to check the lights, trailer tire pressures, and perform electrical diagnostics; and hitch guidance system to make hooking up a trailer easier.

Engines will include the 5.3L and 6.2L V8s, and the all-new 3.0L turbodiesel inline-six. 

We'll hopefully have more details and pictures as GMC will be holding an event later tonight in Detroit. The 2019 Sierra arrives at dealers this fall.

Source: GMC
Press Release is on Page 2


GMC Introduces the Next Generation 2019 Sierra
Commanding design, segment-leading technologies redefine premium truck

DETROIT — GMC is taking its most popular pickup truck to the next level with the completely redesigned 2019 Sierra Denali and SLT.

Distinguished by bold design and segment-leading technologies, the next generation Sierra Denali once again redefines the premium pickup, while advancing Denali’s legacy as the pinnacle of GMC design, capability and refinement.

“GMC ignited the premium truck segment 17 years ago with the original launch of the Sierra Denali,” said Duncan Aldred, vice president of Global GMC. “The next generation 2019 Sierra Denali establishes a new benchmark in capability and refinement. It exemplifies precision in every detail.”

Powerful proportions and distinctive Denali design help define the Sierra’s unmistakable exterior, while the driver-focused cabin strengthens the brand’s reputation for refinement with premium materials, improved interior space and innovative storage solutions. 

The 2019 Sierra Denali affirms its position as the most premium Sierra ever with segment-leading technologies and exclusive features, including:

  • GMC Exclusive, Industry-first MultiPro Tailgate is the most innovative pickup tailgate ever, with six unique functions and positions offering enhanced second-tier loading and load-stop solutions, a standing workstation and easier access to items in the box.
  • GMC Exclusive, Industry-first Carbon Fiber Pickup Box, the CarbonPro, was developed to increase durability, efficiency and functionality while offering best-in-class dent, scratch and corrosion resistance, making it the most durable pickup box in the segment.
  • All-new ProGrade Trailering System with Trailering App offers a connected comprehensive suite of trailering technology that brings more confidence to the towing experience than ever before.
  • Segment-first Multi-Color Head-Up Display projects key, customizable vehicle data on the windshield in a 3x7-inch display to help drivers keep their eyes on the road.
  • Segment-first Rear Camera Mirror offers an optimized view via an available dual-function interior mirror that expands vision to overcome common visual obstructions like occupants or cargo. This next generation system features a higher resolution camera and display and the ability to tilt or zoom the view.  

The redesigned Sierra Denali offers a full suite of available advanced safety features, along with exclusive chassis technologies such as Adaptive Ride Control.

“The heritage of the GMC brand is rooted in full-size trucks, of which the Sierra is our cornerstone, with our SLT and Denali models contributing 87 percent of our total crew cab sales,” Aldred said. “The next generation Sierra caters to these unique customers who demand a premium, innovative truck that supports their professional and personal passions.”

A commanding presence
The 2019 Sierra Denali debuts a profound new GMC design. A taller, more confident stance gives Sierra Denali powerful proportions complemented by hallmark details such as a chrome grille with a sharp, precise dimensional pattern that epitomizes the truck’s attention to detail.

“The next generation Sierra Denali has a deliberate, commanding presence,” said Matt Noone, director of design, GMC Exteriors. “Its unmistakable design embodies the essence of GMC, while advancing the brand’s core styling elements — rooted in inherent capability — with a new expression of its signature cues.”

Sierra shows refinement and strength through a larger, more-dominant upright grille, a taller hood, and a bolder, more pronounced take on GMC’s C-shaped lighting signature.

Advanced lighting technology distinguishes the Sierra Denali from every other truck on the road. GMC’s front lighting signature is conveyed through a prominent “light blade” that delivers uniform LED illumination for the daytime running lamps. LEDs are also used for the headlamps, taillamps, fog lamps and other illuminative elements, with lenses constructed from durable material with an almost crystalline quality.

The truck is larger than the previous truck in virtually every dimension, and the larger grille and dramatic lighting accentuate its broad-shouldered stance. The wheels are pushed closer to the corners and wear larger diameter tires. Denali features available 22-inch Ultra Bright aluminum wheels; the SLT model offers its own unique 22-inch dark aluminum wheels finished with chrome accents.

New, more prominent badging includes a bold DENALI nameplate on the tailgate —expressed in a new block-style typeface that echoes the truck’s strong proportions — below the signature GMC identification.

An elevated interior refined
The Sierra Denali’s new interior builds on the refinement and sophistication that have become synonymous with Denali, topping the segment with best-in-class front head- and legroom (maximum), providing a more spacious, driver-centric environment finished with premium materials. 

Putting the driver at the center of experience starts with a higher seating position that offers a confident view behind the wheel. The optimized ergonomics emphasize easy, intuitive interaction with the vehicle’s technologies, such as the all-new Trailering App and segment-first Head-Up Display.

Denali-exclusive materials — including premium leather-appointed seating, authentic open-pore wood trim and dark-finish aluminum decor — help raise the interior to a new level of refinement. The exclusive leather appointments have a distinctive, large-pebbled grain with a contrasting stitch pattern that is both premium in appearance and touch without sacrificing durability, and the wood trim features an open-pore texture evocative of hand-planed furniture.    

When it comes to the space and storage vital to truck customers, the 2019 Sierra’s crew cab has nearly 3 inches of additional rear-seat legroom compared to the current model. The outboard rear seat backs open to reveal rectangular storage spaces large enough for storing tablets or laptops, tie-down cords, umbrellas or other important accessories.

Groundbreaking cargo box capability and materials
The next generation 2019 Sierra debuts a GMC exclusive, industry-first MultiPro Tailgate that is the segment’s most innovative tailgate ever. Standard on SLT and Denali, the MultiPro Tailgate features six unique functions and positions, offering enhanced second-tier loading and load-stop solutions, a standing workstation mode and easier access to items in the box.

The MultiPro Tailgate also incorporates a step entry and egress mode that, when paired with the assist handle, offers both step and seated functionality, with a maximum weight capacity of 375 pounds (170 kg). Ease of use is enhanced with two buttons on the tailgate handle that allow convenient inner gate release.

This multifunctional tailgate offers proven strength and durability, having undergone more testing and validation than any tailgate in GM’s history. Sierra is the first and only truck to offer the MultiPro Tailgate, providing premium truck customers the ultimate flexibility. MultiPro Tailgate will be standard on Denali and SLT.

The cargo boxes also offer best-in-class cargo volume — 63 cubic feet (1,784 liters) on the short box, as well as additional tie-downs and a new, available 110-volt power outlet. The bed continues to be made of roll-formed, high-strength steel, yet a revised alloy offers 50 percent more strength than the current model.

The 2019 Sierra Denali will offer, later in the model year, an available GMC exclusive and industry-first carbon fiber box — the CarbonPro — developed to increase durability, efficiency and functionality of the truck. It replaces the standard steel inner panels and floor with a lightweight, purpose-designed carbon fiber composite that offers best-in-class dent, scratch and corrosion resistance, making it the most durable pickup box in the segment.

“In 116 years of making GMC pickup trucks, our industry-first carbon fiber box is the toughest and most durable pickup box we have ever made,” Aldred said.

The new CarbonPro box is 62 pounds (28 kg) lighter than the steel version, and is one example of GMC’s strategic use of materials in engineering the Sierra. The strategy also incorporates aluminum for the doors, hood and tailgate, while relying on steel for the fenders, roof and standard cargo box to shave up to 360 pounds (163 kg) from Sierra compared today’s model.

ProGrade Trailering System with Trailering App
The 2019 Sierra offers a more confident towing experience thanks to GMC’s new ProGrade Trailering System, standard on Denali and SLT. The trailering system includes an all-new Trailering App featuring a Pre-Departure checklist, Maintenance Reminders, Trailer Light Test, Trailer Electrical Diagnostics and Trailer Tire Pressure and Temperature Monitoring.

Many of the Trailering App’s functions, including the lighting test and pre-departure checklist, are also available with the MyGMC app on compatible Android and iOS smartphones, a feature that offers great convenience when outside the truck or trailer.

The next generation Sierra also offers Hitch Guidance with Hitch View and Auto Electric Park Brake to help with perfect positioning when hitching. The available side view cameras and a trailer-mounted HD camera provide additional assistance when driving down the road or in reverse. With exclusive Trailer Theft Detection, owners can receive text and mobile alerts from OnStar when the trailer has been detached from the truck without permission.    

Purposeful technologies
Seamless, driver-focused technology has long been a Denali standard, and the 2019 Sierra Denali establishes a new benchmark by incorporating purposeful technologies.

These technologies work together to increase functionality and enhance comfort and convenience. Highlights include:

  • Segment-first Multi-color 3x7 Head-Up Display: The 2019 Sierra is the first full-size truck to offer this technology, which projects key vehicle information on the windshield within the driver’s line of sight.
  • Advanced GMC infotainment: This new, dynamic platform offers a smartphone-like experience with an intuitive interface, faster response and improved voice recognition. Sierra Denali’s standard 8-inch diagonal system includes navigation. 
  • Segment-first Rear Camera Mirror: This available dual-function interior mirror offers an optimized camera view that can help the driver’s view around potential vision obstructions such as occupants or cargo, while also offering a greater field of vision. This next gen system features a higher resolution camera, a higher resolution display and the ability to tilt or zoom the view. A conventional mirror view is also available.
  • Surround Vision: Offering a bird’s-eye view of the truck, this available feature displays an overhead image on the infotainment screen, helping the driver detect potential obstacles when backing up, including when trailering.
  • Full suite of advanced safety features: The 2019 Sierra Denali offers a full range of available advanced safety features, including Side Blind Zone Alert, Pedestrian Detection and Low Speed Forward Automatic Braking.

Sierra performance
New versions of the proven 6.2L and 5.3L V-8 engines will be joined by an all-new 3.0L inline-six turbo-diesel engine, expanding the powertrain lineup for the 2019 Sierra.

The 5.3L and 6.2L engines feature stop/start technology and new Dynamic Fuel Management that enables the engine to operate on one to eight cylinders, depending on demand, to optimize power and efficiency. The new diesel builds on GMC’s expertise with Duramax turbo-diesels offered in Sierra HD and Canyon models. The available 6.2L and 3.0L engines are paired with a 10-speed automatic transmission.

Sierra Denali features an exclusive Adaptive Ride Control suspension system designed to provide premium driving refinement with exceptional responsiveness. It employs sophisticated sensors to monitor road conditions and chassis responses in real time, enabling adjustments to active dampers every 2 milliseconds.

Coming this fall
The 2019 GMC Sierra Denali and SLT go on sale this fall. Additional details will be released closer to the start of production.


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This Rocks! :metal: 

I love this look so much better than the Chevy version and the tailgate I think is very cool. This is right up there with the Ram Stagecoach tailgate. Both are very useful and cool.

Love the Dash, clean easy to use and well laid out. I am gonna be excited to see one in person.

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Love the exterior. Not sold on the interior of the Chevy, so not sure some fancy trim is going to help.

Another power train announcement is coming later this month.

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Wonder how long before videos are made about the Carbon Fiber bed versus Aluminum bed since Chevy went batt shit crazy on Aluminum versus Steel? :scratchchin:

I also like that the Carbon Fiber can lift inside as a stop measure for materials in the bed.

GMC Truck Bed.jpg

This should make many happy! Inline Smoothness Baby! :D 

2019 Sierra will be available with a 5.3-liter gas V8, a 6.2-liter V8 or a new 3.0-liter inline six-cylinder Duramax diesel

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The Wheel Arch Police are going to have a collective coronary over the new Sierra.  They're not round.  They're not square.  WHAT ARE THEY???   :o

I hope the announcement is some sort of gasoline 6.

Edited by ocnblu

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I'm confused by the title of this thread, when since the 2007 redesign, Silverado and Sierra have shared only roof panels and doors... all other exterior panels are different.

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8 minutes ago, ocnblu said:

I'm confused by the title of this thread, when since the 2007 redesign, Silverado and Sierra have shared only roof panels and doors... all other exterior panels are different.

I'm talking generally - I know they are different. But to the normal person, they may only notice the different front ends.

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Oh God, I'd really really like one of these!

• I said a long while ago here I'd like to see the tailgate utilized instead of just being a drop door; I use mine as a work surface all the time. GMC put a lot of engineering into this gate, very interesting & versatile. What I'd like to see & proposed in the past is some sort of hold-down/clamping system, such as a lateral V-groove and some sort of 'T' lockdowns one can slide into grooves- so you could clamp & cut material off the gate.

• 'Work surface' is fine for a laptop (that's not work ;) ) but too high for anything else.

• I would also like to see some sort of shielded arms that replace the tailgate cables- truly freeing up that surface. If they can make the gate power-drop in a controlled manner, it could be readily possible to have something in the bed walls that isn't open to the bed, yet lowers & HOLDS the tailgate open/ supports the same weight.

All in all tho, I'm pretty in awe of the MultiPro gate.

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That's a pretty slick tailgate..I like how the center can be used as a step.   

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Over at GMC's preview site, they only list crewcab short and long (er) bed, and SLT and Denali trim levels.  Is GMC truly only going to try to sell upscale trucks with no regular cab, no 8 foot bed, and no lower trims?

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4 minutes ago, ocnblu said:

Over at GMC's preview site, they only list crewcab short and long (er) bed, and SLT and Denali trim levels.  Is GMC truly only going to try to sell upscale trucks with no regular cab, no 8 foot bed, and no lower trims?

That would help differentiate them from Chevy more... the sales of regular cab and long bed GMCs are probably a very low percentage of production now...the profit is in luxury trim 4drs...

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1 hour ago, balthazar said:

Oh God, I'd really really like one of these!

• I said a long while ago here I'd like to see the tailgate utilized instead of just being a drop door; I use mine as a work surface all the time. GMC put a lot of engineering into this gate, very interesting & versatile. What I'd like to see & proposed in the past is some sort of hold-down/clamping system, such as a lateral V-groove and some sort of 'T' lockdowns one can slide into grooves- so you could clamp & cut material off the gate.

• 'Work surface' is fine for a laptop (that's not work ;) ) but too high for anything else.

• I would also like to see some sort of shielded arms that replace the tailgate cables- truly freeing up that surface. If they can make the gate power-drop in a controlled manner, it could be readily possible to have something in the bed walls that isn't open to the bed, yet lowers & HOLDS the tailgate open/ supports the same weight.

All in all tho, I'm pretty in awe of the MultiPro gate.

I agree with what you said, what sold it for me was the change into a step system to get into the truck much easier than the Ford system I think. I also loved the flip up lip to hold stuff in when the tailgate is down.

35 minutes ago, ocnblu said:

Over at GMC's preview site, they only list crewcab short and long (er) bed, and SLT and Denali trim levels.  Is GMC truly only going to try to sell upscale trucks with no regular cab, no 8 foot bed, and no lower trims?

I totally think it should be that way, above Chevy. Yet with that said I bet you can get the basic stuff from the fleet sales rep.

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• Steps in the bumper aren't really useful at all, since they aren't any lower than the hitch step. But a step halfway between the bumper top & the ground is.
• Ocn- are you referring to the 'Standard Bed'? :P
• The 'load stop' feature is OK, but anyone can use the raised tailgate as a load stop just as easily.
• BIG QUESTION : does this tailgate feature any sort of locking mechanism to the truck? Not a locking latch, but a way to insure someone doesn't take the gate off your truck? These have got to cost every bit of $2000 to replace.

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love the chevy, love this, both home runs.  the interior of the chevy is kinda cheap but its not going to keep anyone from liking the truck.  they each have their own look.  both done well.

GM scored bullseye with these new trucks as well as the Traverse / Enclave.  Curious why they can't seem to hit dead center with some of the other products like the bizarre new Equinox, FUBARred Acadia etc.

Can't wait for the Yukon / tahoe / Suburbans that get birthed from this.

Edited by regfootball

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2 hours ago, ocnblu said:

Over at GMC's preview site, they only list crewcab short and long (er) bed, and SLT and Denali trim levels.  Is GMC truly only going to try to sell upscale trucks with no regular cab, no 8 foot bed, and no lower trims?

I highly doubt it. I think GMC will be slowly dolling out information up until the fall launch.

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1 hour ago, balthazar said:

• BIG QUESTION : does this tailgate feature any sort of locking mechanism to the truck? Not a locking latch, but a way to insure someone doesn't take the gate off your truck? These have got to cost every bit of $2000 to replace.

Considering that the auto fob has a remote tailgate opener button, I would have to doubt it is easy to remove the tailgate unlike older trucks where you just disconnected the tailgate cables and then lifted a corner and disconnected the gate.

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They're putting that stop on there because the bed, at 5', is not useful for hauling anything big unless the tailgate is down.  And if the gate locks, and it is closed and locked, how is it going to be stolen?  It still has to be raised up off the trunnions to remove it, and it can't be raised if the latches are locked.

The "bigwigs" speaking at the launch said "starting with the SLT..." which indicates to me, in addition to the preview site, my concern about the availability of lower trims.  I hope you're right about different cab styles, bed lengths and trim levels.

Anyway, I won't be able to afford any of them so maybe I shouldn't cry.  But the farmer or contractor, etc, who has always bought GMC work trucks might have something to say.  If this is indeed the case, it is GM's strategy of selling fewer units at higher prices in play.

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Have to see what configurations, on what bed lengths, and at what option price the MultiGate is going to be. I think as an option (if made so), it's going to be quite expensive- like close to a grand. Bill- what's your off-hip guess at replacement cost for something like this for accident repair?

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Don't fret. There will still be GMC work trucks. Work trucks are generally not news makers, so that's why you haven't seen anything about them.  Flash (Denali) and wow (MultiPro) are what generate headlines, not base model white trucks that will be found at a local construction firm. 

I like the MultiPro gate, but I wonder the weight it can support. It would be good for hauling a motorcycle.

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Given how huge the grille is on the 1500, I wonder how big it will be on the HD versions..the front is less overwrought than the Chevy, but still pretty busy in all the details. 

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16 hours ago, ocnblu said:

I'm confused by the title of this thread, when since the 2007 redesign, Silverado and Sierra have shared only roof panels and doors... all other exterior panels are different.

Trivially different bulges in the front and rear fenders didn't mean real differences, though..same meat, slightly different toppings. 

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1 hour ago, Cubical-aka-Moltar said:

Trivially different bulges in the front and rear fenders didn't mean real differences, though..same meat, slightly different toppings. 

Like a Banana Split Sundae! :P 

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      Available on LT, RST, LTZ and High Country models, the 3.0L Duramax diesel rounds out the new Silverado’s range of six propulsion choices, each tailored to suit customers’ needs for performance, efficiency, technology and value. It is rated at an SAE-certified 277 horsepower and 460 lb-ft of torque delivering 95 percent of peak torque at just 1,250 rpm. Peak torque is sustained from 1,500 rpm through 3,000 rpm, providing a powerfully smooth and satisfying driving experience.
      The 3.0L Duramax is paired with GM’s 10L80 10-speed automatic transmission, featuring a centrifugal pendulum absorber torque converter that reduces vibrations to improve smoothness, reinforcing its performance, efficiency and refinement. This combination also offers exhaust braking, which uses the diesel engine’s compression to help slow the vehicle, requiring fewer brake applications by the driver when in Tow Haul mode.
      Innovative Engine Technologies
      The inline six-cylinder architecture offers inherent efficiency and refinement, but the team expanded with smart technology choices to help improve efficiency and weight while optimizing the truck experience. A lightweight aluminum block and cylinder head reduce overall mass, and Active Thermal Management enhances efficiency and cold-weather warm-up. Ceramic glow plugs also help with shorter heat-up times and a quicker cold start, meaning the engine block heater is not needed until -22 degrees F.
      Towing is an important part of owning a truck, and customers can gain additional confidence thanks to the exhaust brake available in tow-haul mode. The water charge air cooler, coupled with low pressure EGR, reduces time to torque. The variable geometry turbocharger helps provide a greater balance of performance and efficiency, and an electronically variable intake manifold helps optimize performance across the rpm band.
      Inherently efficient and balanced
      Compared to a DOHC V-6, the inline-six architecture offers greater efficiency from the reduced friction of operating only two camshafts and their associated valvetrain components. The I6 configuration offers the perfect balance of primary and secondary forces, without the need for balancing shafts.
      “In addition to reduced friction, the architecture enables smooth operation,” Menarini said. “The new Duramax 3.0L elevates the 2019 Silverado with one of the most refined and efficient diesel engines in the segment.”
      Along with supporting elements such as a tuned air induction system and other noise-attenuating elements, the 3.0L Duramax delivers exceptional quietness and smoothness at all engine speeds.
      All-aluminum construction and tough rotating assembly
      The 3.0L Duramax cylinder block is made of a cast aluminum alloy that provides the strength required to support the high combustion pressures that occur within a diesel engine, while also offering an approximately 25 percent mass savings over a comparable cast iron engine block. Iron cylinder liners are used within the aluminum block to insure truck durability.
      There are seven nodular iron main bearing caps that help ensure the block’s strength under those high combustion pressures, while also enabling accurate location of the rotating assembly. A deep-skirt block design, where the block casting extends below the crankshaft centerline, also contributes to the engine’s stiffness and refinement. It’s complemented by a stiffness-enhancing aluminum lower crankcase extension attached to the main bearing caps.
      The rotating assembly consists of a forged steel crankshaft, forged steel connecting rods and hypereutectic aluminum pistons. The alloys in the respective castings for the rods and pistons make them lightweight and durable. Silicon is blended with the aluminum for heat resistance and tolerance within the piston cylinders, which enhances performance and makes the engine quiet.
      A thick piston crown — the top of the piston — and reinforced top ring add strength to support the tremendous cylinder pressures enabled by turbocharging and the engine’s high 15.0:1 compression ratio.
      DOHC Cylinder Head and Rear Cam Drive
      Overhead camshafts offer a direct, efficient means of operating the valves, while four valves per cylinder activated by maintenance-free finger followers with hydraulic lash adjusters increase airflow in and out of the engine. This arrangement is integrated on the Duramax 3.0L’s lightweight aluminum cylinder head, which is topped with a lightweight composite cam cover that incorporates the crankcase ventilation and oil separation systems.
      A pair of lightweight, assembled camshafts actuates 28.35 mm diameter (1.12-inch) intake and 24.55 mm diameter (0.97-inch) exhaust valves. The camshaft drivetrain is uniquely located at the rear (flywheel side) of the engine, for greater refinement and packaging considerations for the comparatively long inline-six. A crankshaft-driven chain drives the high-pressure direct-injection fuel pump, while a chain driven by the fuel pump drives both intake and exhaust camshafts. A smaller belt drives the variable flow oil pump from the crankshaft.
      Additional Technology Highlights
      Variable geometry turbocharging enables the Duramax 3.0L engine to deliver class-leading horsepower with minimal effect on overall efficiency. The system uses closed loop controlled vanes position and sophisticated electronic controls to automatically adjust boost pressure to the desired value based on engine running conditions and instantaneous power demand. The liquid-cooled turbocharger features a low-friction ball-bearing shaft and is mounted close to the exhaust outlet of the engine for quicker spool-up of the turbine and quicker light-off of the exhaust catalyst. A water-to-air intercooling system produces a cooler higher density air charge for greater power. Maximum boost pressure is 43,5 psi (300 Kpa) absolute.
      Low-pressure EGR: The Duramax 3.0L utilizes new low-pressure Exhaust Gas Recirculation to optimize performance and efficiency. The EGR system diverts some of the engine-out exhaust gas and mixes it back into the fresh intake air stream, which is drawn into the cylinder head for combustion. That lowers combustion temperatures and rates.
      Traditionally, EGR systems in diesel applications recirculate exhaust gases between the two high-pressure points, the exhaust manifold(s) and intake manifold. However, it generally requires efficiency-robbing assistance from the turbocharger or other supporting elements to achieve the pressure differential required for sufficient EGR flow rates.
      The new low-pressure system adds to the high-pressure system, supporting continual adjustment of exhaust backpressure for more efficient operation. It recirculates gases between the low-pressure points in the exhaust system (downstream of the particulate filter) and after the compressor inlet.
      When the low-pressure EGR is activated by an electronically controlled valve, the engine burns exhaust gas that has already passed through the particulate filter. That increases the turbocharger’s efficiency, which helps overall vehicle efficiency without deteriorating the rate of particulate matter emitted by the engine.
      A variable intake manifold offers dual air intake pathways for each cylinder. Electronically controlled flaps — one for each cylinder — shorten or lengthen the airflow to each cylinder. This optimizes the airflow into the engine and improves performance and responsiveness across the rpm band, particularly at lower engine speeds.
      A variable-pressure oiling system with a continuously variable-displacement vane oil pump enhances efficiency by optimizing oil pressure as a function of engine speed and load. With it, the oil supply is matched to the engine requirements rather than the excessive supply of a conventional, fixed-displacement oil pump. The engine uses low-friction Diesel Dexos 0W20 oil.
      Oil jets located in the block are employed for performance and temperature control. They target the inner core of the piston with an extra layer of cooling, friction-reducing oil. The jets reduce piston temperature, allowing the engine to produce more power and enhance long-term durability than engines without the technology.
      Active Thermal Management helps the engine warm up quickly to achieve and maintain its optimal engine temperature for performance and efficiency over the entire engine operating range. The system uses a three-actuator rotary valve system to distribute coolant through the engine in a targeted manner. It sends heat where it’s needed to warm up the engine to reduce friction and heat the passenger cabin or cools when needed for high-power operation. The Duramax 3.0L also features split cooling between the block and head.
      Common rail direct fuel injection of 2,500 bar (36,250 psi) helps generates class-leading horsepower and torque. The system’s pressure is generated by an engine-driven twin-piston pump sending fuel to solenoid-activated injectors with nine-hole nozzles that support precise metering of the fuel for a smooth idle and lower combustion noise. The fuel system is capable of multiple injections per combustion cycle — up to 10 times per injector — for more consistent and stable combustion performance that translates into smoothness and refinement, particularly at idle.   
      Electronic throttle valve: The Duramax 3.0L features an electronic throttle valve to regulate intake manifold pressure in order to optimize exhaust gas recirculation rates. It also contributes to a smooth engine shutdown via a more controlled method of airflow reduction.
      Ceramic glow plugs used in the Duramax 3.0L heat up more quickly and hotter than conventional metal-based glow plugs, helping the engine start and heat up more quickly in cold weather. The Duramax 3.0L achieves unassisted and assisted starting temperatures of -22 F (-30 C) and -40 F (-40 C) respectively.
      Stop/start technology helps optimize efficiency in city driving. The driver-selectable system shuts off the engine at stoplights and other stop-and-go situations. The engine automatically restarts when the driver takes their foot off the brake.
      ABOUT CHEVROLET
      Founded in 1911 in Detroit, Chevrolet is one of the world's largest car brands, doing business in more than 100 countries and selling more than 4.0 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature engaging performance, design that makes the heart beat, passive and active safety features and easy-to-use technology, all at a value. More information on Chevrolet models can be found at www.chevrolet.com.
      # # #
      2019 CHEVROLET SILVERADO 3.0L DURAMAX TURBO-DIESEL SPECIFICATIONS
      Type:
      Duramax 3.0L DOHC Turbo Diesel I6 
      Bore & Stroke (in. / mm):
      3.30 x 3.54 inches (84mm x 90mm)
      Block Material:
      Aluminum
      Cylinder Head Material:
      Aluminum
      Compression Ratio:
      15.0: 1
      Firing Order:
      1-5-3-6-2-4
      Valvetrain:
      Dual-overhead camshafts, four-valves per cylinder
      Air Delivery:
      Single variable-geometry turbocharger; intercooling system. 42.8-psi / 2.95 bar max boost
      Fuel Delivery:
      High-pressure, common-rail direct injection (36,250 psi / 2500 bar); electronic throttle valve
      Ignition System:
      Compression
      Max Engine Speed:
      5100 rpm
      Additional Features:
      Continuously variable oil pump; engine oil cooler, automatic stop/start, Active Thermal Management,
      Emissions Control:
      Low-pressure Exhaust Gas Recirculation (EGR); Selective Catalyst Reduction on Filter (SCRF)
      Horsepower
      (hp / kW @ rpm):
      277 / 204 @ 3750 (SAE certified)
      Torque
      (lb.-ft. / Nm @ rpm):
      460 / 624 @ 1500 (SAE certified)
       

      View full article
    • By Drew Dowdell
      GM released power figures today for the new inline 6-cylinder diesel engine that will be available in the Chevrolet Silverado and GMC Sierra.  Available at the same price as the 6.2 liter model, GM promises the new engine will change perceptions about diesel performance and refinement.  GM recently announced the delay of the 3.0-liter diesel until the 2020 model year due to emissions certification delays. 
      Paired with a 10-speed automatic transmission, the diesel produces an SAE-certified 277 horsepower and 460 lb-ft of torque with 95 percent of that torque being available at just 1,250 RPM.  Torque peak comes at 1500 rpm and peak horsepower at 3750 rpm.
      The powertrain is setup to offer diesel exhaust braking to help slow the vehicle when the truck is in tow-haul mode, limiting the number of applications of the brakes to save on brake wear. The engine also has a user selective start-stop function to save additional fuel in city driving. 
      2019 CHEVROLET SILVERADO 3.0L DURAMAX TURBO-DIESEL SPECIFICATIONS
      Type:
      Duramax 3.0L DOHC Turbo Diesel I6 
      Bore & Stroke (in. / mm):
      3.30 x 3.54 inches (84mm x 90mm)
      Block Material:
      Aluminum
      Cylinder Head Material:
      Aluminum
      Compression Ratio:
      15.0: 1
      Firing Order:
      1-5-3-6-2-4
      Valvetrain:
      Dual-overhead camshafts, four-valves per cylinder
      Air Delivery:
      Single variable-geometry turbocharger; intercooling system. 42.8-psi / 2.95 bar max boost
      Fuel Delivery:
      High-pressure, common-rail direct injection (36,250 psi / 2500 bar); electronic throttle valve
      Ignition System:
      Compression
      Max Engine Speed:
      5100 rpm
      Additional Features:
      Continuously variable oil pump; engine oil cooler, automatic stop/start, Active Thermal Management,
      Emissions Control:
      Low-pressure Exhaust Gas Recirculation (EGR); Selective Catalyst Reduction on Filter (SCRF)
      Horsepower
      (hp / kW @ rpm):
      277 / 204 @ 3750 (SAE certified)
      Torque
      (lb.-ft. / Nm @ rpm):
      460 / 624 @ 1500 (SAE certified)
      Manufacturing Location (of globally sourced parts)
      Flint, Mich.  
       
       
      Chevy Press release on page 2


      2020 CHEVROLET SILVERADO’S NEW, ADVANCED 3.0L DURAMAX TURBO-DIESEL REDEFINES EXPECTATIONS
      No-compromise engine delivers refinement, performance and efficiency
      2019-06-03
      DETROIT — The all-new 2020 Chevrolet Silverado’s available 3.0L Duramax inline-six turbo-diesel engine adds choice and versatility for full-size truck customers, offering class-leading torque and horsepower in addition to focusing on fuel economy and capability. It is the first-ever inline-six turbo-diesel offered in Chevrolet’s full-size light-duty trucks.
      Chevrolet engineers started with a clean-sheet design and developed an all-new engine that leverages the efficiency and refinement advantages of the inline six-cylinder architecture and incorporates advanced combustion and emissions technologies to optimize performance and efficiency. It is priced identically to the 6.2L V-8 as a $2,495 premium over a 5.3L V-8 model or $3,890 over a 2.7L Turbo model.
      “From the moment the engine is started, to its idle, acceleration and highway cruising, the 3.0L Duramax performance will change perceptions of what a diesel engine can offer in refinement,” said Nicola Menarini, director for Diesel Truck Engine Program Execution. “With advanced technologies that draw on global diesel expertise, it’s a no-compromise choice for those who want the capability and driving range of a diesel in a light-duty truck.”
      Available on LT, RST, LTZ and High Country models, the 3.0L Duramax diesel rounds out the new Silverado’s range of six propulsion choices, each tailored to suit customers’ needs for performance, efficiency, technology and value. It is rated at an SAE-certified 277 horsepower and 460 lb-ft of torque delivering 95 percent of peak torque at just 1,250 rpm. Peak torque is sustained from 1,500 rpm through 3,000 rpm, providing a powerfully smooth and satisfying driving experience.
      The 3.0L Duramax is paired with GM’s 10L80 10-speed automatic transmission, featuring a centrifugal pendulum absorber torque converter that reduces vibrations to improve smoothness, reinforcing its performance, efficiency and refinement. This combination also offers exhaust braking, which uses the diesel engine’s compression to help slow the vehicle, requiring fewer brake applications by the driver when in Tow Haul mode.
      Innovative Engine Technologies
      The inline six-cylinder architecture offers inherent efficiency and refinement, but the team expanded with smart technology choices to help improve efficiency and weight while optimizing the truck experience. A lightweight aluminum block and cylinder head reduce overall mass, and Active Thermal Management enhances efficiency and cold-weather warm-up. Ceramic glow plugs also help with shorter heat-up times and a quicker cold start, meaning the engine block heater is not needed until -22 degrees F.
      Towing is an important part of owning a truck, and customers can gain additional confidence thanks to the exhaust brake available in tow-haul mode. The water charge air cooler, coupled with low pressure EGR, reduces time to torque. The variable geometry turbocharger helps provide a greater balance of performance and efficiency, and an electronically variable intake manifold helps optimize performance across the rpm band.
      Inherently efficient and balanced
      Compared to a DOHC V-6, the inline-six architecture offers greater efficiency from the reduced friction of operating only two camshafts and their associated valvetrain components. The I6 configuration offers the perfect balance of primary and secondary forces, without the need for balancing shafts.
      “In addition to reduced friction, the architecture enables smooth operation,” Menarini said. “The new Duramax 3.0L elevates the 2019 Silverado with one of the most refined and efficient diesel engines in the segment.”
      Along with supporting elements such as a tuned air induction system and other noise-attenuating elements, the 3.0L Duramax delivers exceptional quietness and smoothness at all engine speeds.
      All-aluminum construction and tough rotating assembly
      The 3.0L Duramax cylinder block is made of a cast aluminum alloy that provides the strength required to support the high combustion pressures that occur within a diesel engine, while also offering an approximately 25 percent mass savings over a comparable cast iron engine block. Iron cylinder liners are used within the aluminum block to insure truck durability.
      There are seven nodular iron main bearing caps that help ensure the block’s strength under those high combustion pressures, while also enabling accurate location of the rotating assembly. A deep-skirt block design, where the block casting extends below the crankshaft centerline, also contributes to the engine’s stiffness and refinement. It’s complemented by a stiffness-enhancing aluminum lower crankcase extension attached to the main bearing caps.
      The rotating assembly consists of a forged steel crankshaft, forged steel connecting rods and hypereutectic aluminum pistons. The alloys in the respective castings for the rods and pistons make them lightweight and durable. Silicon is blended with the aluminum for heat resistance and tolerance within the piston cylinders, which enhances performance and makes the engine quiet.
      A thick piston crown — the top of the piston — and reinforced top ring add strength to support the tremendous cylinder pressures enabled by turbocharging and the engine’s high 15.0:1 compression ratio.
      DOHC Cylinder Head and Rear Cam Drive
      Overhead camshafts offer a direct, efficient means of operating the valves, while four valves per cylinder activated by maintenance-free finger followers with hydraulic lash adjusters increase airflow in and out of the engine. This arrangement is integrated on the Duramax 3.0L’s lightweight aluminum cylinder head, which is topped with a lightweight composite cam cover that incorporates the crankcase ventilation and oil separation systems.
      A pair of lightweight, assembled camshafts actuates 28.35 mm diameter (1.12-inch) intake and 24.55 mm diameter (0.97-inch) exhaust valves. The camshaft drivetrain is uniquely located at the rear (flywheel side) of the engine, for greater refinement and packaging considerations for the comparatively long inline-six. A crankshaft-driven chain drives the high-pressure direct-injection fuel pump, while a chain driven by the fuel pump drives both intake and exhaust camshafts. A smaller belt drives the variable flow oil pump from the crankshaft.
      Additional Technology Highlights
      Variable geometry turbocharging enables the Duramax 3.0L engine to deliver class-leading horsepower with minimal effect on overall efficiency. The system uses closed loop controlled vanes position and sophisticated electronic controls to automatically adjust boost pressure to the desired value based on engine running conditions and instantaneous power demand. The liquid-cooled turbocharger features a low-friction ball-bearing shaft and is mounted close to the exhaust outlet of the engine for quicker spool-up of the turbine and quicker light-off of the exhaust catalyst. A water-to-air intercooling system produces a cooler higher density air charge for greater power. Maximum boost pressure is 43,5 psi (300 Kpa) absolute.
      Low-pressure EGR: The Duramax 3.0L utilizes new low-pressure Exhaust Gas Recirculation to optimize performance and efficiency. The EGR system diverts some of the engine-out exhaust gas and mixes it back into the fresh intake air stream, which is drawn into the cylinder head for combustion. That lowers combustion temperatures and rates.
      Traditionally, EGR systems in diesel applications recirculate exhaust gases between the two high-pressure points, the exhaust manifold(s) and intake manifold. However, it generally requires efficiency-robbing assistance from the turbocharger or other supporting elements to achieve the pressure differential required for sufficient EGR flow rates.
      The new low-pressure system adds to the high-pressure system, supporting continual adjustment of exhaust backpressure for more efficient operation. It recirculates gases between the low-pressure points in the exhaust system (downstream of the particulate filter) and after the compressor inlet.
      When the low-pressure EGR is activated by an electronically controlled valve, the engine burns exhaust gas that has already passed through the particulate filter. That increases the turbocharger’s efficiency, which helps overall vehicle efficiency without deteriorating the rate of particulate matter emitted by the engine.
      A variable intake manifold offers dual air intake pathways for each cylinder. Electronically controlled flaps — one for each cylinder — shorten or lengthen the airflow to each cylinder. This optimizes the airflow into the engine and improves performance and responsiveness across the rpm band, particularly at lower engine speeds.
      A variable-pressure oiling system with a continuously variable-displacement vane oil pump enhances efficiency by optimizing oil pressure as a function of engine speed and load. With it, the oil supply is matched to the engine requirements rather than the excessive supply of a conventional, fixed-displacement oil pump. The engine uses low-friction Diesel Dexos 0W20 oil.
      Oil jets located in the block are employed for performance and temperature control. They target the inner core of the piston with an extra layer of cooling, friction-reducing oil. The jets reduce piston temperature, allowing the engine to produce more power and enhance long-term durability than engines without the technology.
      Active Thermal Management helps the engine warm up quickly to achieve and maintain its optimal engine temperature for performance and efficiency over the entire engine operating range. The system uses a three-actuator rotary valve system to distribute coolant through the engine in a targeted manner. It sends heat where it’s needed to warm up the engine to reduce friction and heat the passenger cabin or cools when needed for high-power operation. The Duramax 3.0L also features split cooling between the block and head.
      Common rail direct fuel injection of 2,500 bar (36,250 psi) helps generates class-leading horsepower and torque. The system’s pressure is generated by an engine-driven twin-piston pump sending fuel to solenoid-activated injectors with nine-hole nozzles that support precise metering of the fuel for a smooth idle and lower combustion noise. The fuel system is capable of multiple injections per combustion cycle — up to 10 times per injector — for more consistent and stable combustion performance that translates into smoothness and refinement, particularly at idle.   
      Electronic throttle valve: The Duramax 3.0L features an electronic throttle valve to regulate intake manifold pressure in order to optimize exhaust gas recirculation rates. It also contributes to a smooth engine shutdown via a more controlled method of airflow reduction.
      Ceramic glow plugs used in the Duramax 3.0L heat up more quickly and hotter than conventional metal-based glow plugs, helping the engine start and heat up more quickly in cold weather. The Duramax 3.0L achieves unassisted and assisted starting temperatures of -22 F (-30 C) and -40 F (-40 C) respectively.
      Stop/start technology helps optimize efficiency in city driving. The driver-selectable system shuts off the engine at stoplights and other stop-and-go situations. The engine automatically restarts when the driver takes their foot off the brake.
      ABOUT CHEVROLET
      Founded in 1911 in Detroit, Chevrolet is one of the world's largest car brands, doing business in more than 100 countries and selling more than 4.0 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature engaging performance, design that makes the heart beat, passive and active safety features and easy-to-use technology, all at a value. More information on Chevrolet models can be found at www.chevrolet.com.
      # # #
      2019 CHEVROLET SILVERADO 3.0L DURAMAX TURBO-DIESEL SPECIFICATIONS
      Type:
      Duramax 3.0L DOHC Turbo Diesel I6 
      Bore & Stroke (in. / mm):
      3.30 x 3.54 inches (84mm x 90mm)
      Block Material:
      Aluminum
      Cylinder Head Material:
      Aluminum
      Compression Ratio:
      15.0: 1
      Firing Order:
      1-5-3-6-2-4
      Valvetrain:
      Dual-overhead camshafts, four-valves per cylinder
      Air Delivery:
      Single variable-geometry turbocharger; intercooling system. 42.8-psi / 2.95 bar max boost
      Fuel Delivery:
      High-pressure, common-rail direct injection (36,250 psi / 2500 bar); electronic throttle valve
      Ignition System:
      Compression
      Max Engine Speed:
      5100 rpm
      Additional Features:
      Continuously variable oil pump; engine oil cooler, automatic stop/start, Active Thermal Management,
      Emissions Control:
      Low-pressure Exhaust Gas Recirculation (EGR); Selective Catalyst Reduction on Filter (SCRF)
      Horsepower
      (hp / kW @ rpm):
      277 / 204 @ 3750 (SAE certified)
      Torque
      (lb.-ft. / Nm @ rpm):
      460 / 624 @ 1500 (SAE certified)
       
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