Review: 2017 GMC Sierra Denali 2500HD

Album created by William Maley · Updated June 12, 20179 yr

The 2017 GMC Sierra Denali 2500HD is the flagship of GMC's heavy-duty truck lineup, combining serious towing and hauling capability with genuine luxury appointments. Powered by the 6.6-liter Duramax turbo-diesel V8 paired with an Allison 1000 automatic transmission, it delivers confident performance in a dark granite metallic exterior with polished chrome 20-inch wheels. Inside, a Denali-badged leather-wrapped steering wheel, 8-inch IntelliLink infotainment, and two-tone cocoa and dune interior trim set the standard for premium work trucks. Read the 2017 GMC Sierra Denali 2500HD Review

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Drew Dowdell replied to TaurusSHO's topic in The Lounge

They rebuilt the towanda plant almost from the ground up for these engines. I’ll reserve judgement for now.
- 11 hours ago11 hr
- 30,727 replies
Random Thoughts Thread
Random Thoughts Thread

G. David Felt replied to TaurusSHO's topic in The Lounge

There have been plenty of studies done and I will post them here if your interested in the pure science. End result is that depending on the EV manufacturer, some loose range faster than others. Yet for the most part, EV battery packs will last far longer than the fear of the ICE folks are trying to say you will pay for. Pure science EV Battery Degradation Assessment Under Standard Drive Cycles Using Simulated EIS Lithium-ion battery degradation: Comprehensive cycle ageing data and analysis for commercial 21700 cells - ScienceDirect Early prediction of lithium-ion battery degradation with a generative pre-trained transformer | Nature Communications Battery Lifespan | Transportation and Mobility Research | NLR Reports based on outside the US studies: The EV Brand With The Slowest Battery Degradation Isn’t Tesla New study of 1,300 EVs busts battery degradation myths, Kia and Tesla top the list | Electrek Kia beats Tesla in battery capacity retention over time as used electric vehicles exhibit remarkable longevity - Notebookcheck News https://internet-satelitarny.eu/2025/10/31/new-mega%E2%80%91study-of-1300-used-evs-just-blew-up-the-battery%E2%80%91degradation-myth-heres-who-tops-the-list-hint-not-tesla/ Yes, they are new engines with old displacements and marketing that I find funny as I think due to all the V8 issues GM has had especially in the States where they say to use 0w-20 and yet for the same engines outside the country they say to use 5w-30 GM seems to be spinning to take hold of their old reliability that folks remember from the 80's and 90's here. Just my own take on how I am seeing things as GM tries to get in front of their engine issues.
- 13 hours ago13 hr
- 30,727 replies
- - 1
Random Thoughts Thread
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Drew Dowdell replied to TaurusSHO's topic in The Lounge

What are you talking about? They’re new. Just because they use the same displacement as an engine from 1996 or the 1960s doesn’t make them old
- 13 hours ago13 hr
- 30,727 replies
- - 2
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Random Thoughts Thread

Drew Dowdell replied to TaurusSHO's topic in The Lounge

You’re now only putting in 50kw (plus or minus some from charging losses)
- 15 hours ago15 hr
- 30,727 replies
- - 2
Random Thoughts Thread
Random Thoughts Thread

ccap41 replied to TaurusSHO's topic in The Lounge

@Drew Dowdell & @G. David Felt , when BEVs lose battery capacity due to age and/or charging habits, etc. do you still charge the full capacity and it's just a less efficient vehicle? Or do you only charge to the new capacity? For example, If I have a 100kWh battery that has degraded 50% (simple numbers for simplicity). When I charge do I still put 100kWh into the battery and I'm using two times the amount to go from A to B? Or am I now only putting in 50kWh, as that is what the capacity has degraded to? Does the question make sense?
- 15 hours ago15 hr
- 30,727 replies
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G. David Felt replied to TaurusSHO's topic in The Lounge

GMC News, Denali has a new higher trim level, the Denali Ultimate trim. Blah ugly all black interior imho. GMC introduces first ever Acadia Denali Ultimate for 2026 GMC has a new design studio that seems to be rehashing old Hummer concepts. GM officially opens new Advanced Design Pasadena Studio, reveals GMC HUMMER X truck and SUV concepts GMC Hummer EVs have new trim options and they enhanced crab walk mode. 2026 GMC HUMMER EV: A more capable, more advanced supertruck Silverado has the AT4 and Elevation trims now for an EV truck. More choice, more adventure: 2026 GMC Sierra EV adds AT4 and Elevation trims Sad that the Buick line has no new press releases since April 9th 2024 when they announced: 2025 Buick Enclave, a flagship premium SUV with available Super Cruise
- Yesterday at 01:53 AM1 day
- 30,727 replies
Random Thoughts Thread
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G. David Felt replied to TaurusSHO's topic in The Lounge

This is totally expected as used EV sales have skyrocketed as people dump the gas guzzlers. https://www.msn.com/en-us/autos/news/gm-says-buyers-are-moving-away-from-pickups-faster-than-expected/ar-AA25SjWu?ocid=msedgntp&pc=W069&cvid=6a334d1b1b004c0a86bdb27cb1f9c27c&ei=30 Interesting how they are attempting to state that OLD is New and better again. Welcome the old 5.7L and 6.6L V8 engines again. Nothing new, just rehashed. Chevrolet Introduces the Next-Generation 2027 Silverado 1500, the Most Powerful and Advanced Silverado Ever Due to my job, I have had no time to write anything. If you like all things black and matte, then Cadillac has an old but new Blackwing for you with nodes to F1. Blackwing hits the track: Introducing the Cadillac CT5-V Blackwing F1® Collector Series
- Yesterday at 01:45 AM1 day
- 30,727 replies
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Random Thoughts Thread

ccap41 replied to TaurusSHO's topic in The Lounge

No writeup on the new 2027 Silverado Silverado?!?
- Wednesday at 01:41 PM1 day
- 30,727 replies
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Drew Dowdell replied to TaurusSHO's topic in The Lounge
- Tuesday at 06:05 PM2 days
- 30,727 replies
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ccap41 replied to TaurusSHO's topic in The Lounge

I'm no Hurricanes fan, but I am a despiser of the Golden Knights and love that your Hurricanes won! Congrats! It's a really fun time of life when one of "your teams" wins a championship, especially when it's a series and there's a month-long build up of the playoffs. I remember the 2019 Blues championship run and it was such an exciting month+. Everyday I was either talking about last night's game or talking about tonight's game with a fellow Blues fan coworker or friends.
- Monday at 05:01 PM3 days
- 30,727 replies
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Review: 2017 GMC Sierra Denali 2500HD

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