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Tahoe’s chassis and suspension systems have been redesigned for improved ride, handling and quietness over previous models. The vehicle rides on a 116-inch (2,946 mm) wheelbase and features a fully boxed perimeter-type frame, which provides an extremely solid foundation that contributes to Tahoe’s car-like smoothness and ride characteristics. The hydroformed frame has three distinct sections with specific strength and support characteristics. These bays allowed engineers to maximize each section without compromising other areas. Chassis stiffness is greatly enhanced throughout the frame, as well as providing enhanced performance during a crash. Torsional stiffness (side-to-side) was increased 49 percent and beaming frequency (front-to-back) was improved 35 percent over the previous model. As a result, vehicle load capacity is increased by 5 percent. The 2007 Tahoe has wider front and rear tracks than previous-generation models. The front track is 68.2 inches (1731.8 mm) vs. 65 inches (1651 mm) previously. The rear track is 67 inches (1701.8 mm) vs. 65.98 inches (1675.8 mm). A wider track enhances smoothness and promotes overall vehicle stability, which the driver and passenger can feel through Tahoe’s secure ride and handling attributes, as well as flatter, more controlled cornering. Coil-over front suspension A new coil-over-shock front suspension is used on 2WD and 4WD models. The coil-over configuration offers smoother, more precise handling characteristics, especially with larger wheel-and-tire combinations. Vibration and harshness is greatly reduced compared to the previous-generation torsion bar front suspension. The new suspension system uses specially tuned coil springs and 46-mm monotube shock absorbers (except Autoride-equipped LTZ models), along with steel upper control arms and forged aluminum lower control arms. The aluminum lower arms reduce un-sprung mass by approximately 20 pounds (9 kg). A five-link rear suspension is used for Tahoe 2WD and 4WD models. Although similar in design to previous models, the 2007 Tahoe rear suspension features a more robust rear axle design that offers increased payload capacity. Like the front suspension, the rear suspension uses new, stiffer frame mounts for suspension component attachment, along with variable-rate springs and monotube shock absorbers (except with Autoride-equipped LTZ models). The 2007 Tahoe is available with three distinctly tuned suspension systems: ZW7 Premium Smooth Ride: standard on 2WD and 4WD models Z55 (includes Autoride): standard on LTZ Z71 Off Road: available on 4WD models (late 2006 availability) All three suspensions have carefully selected, thoroughly tested, distinct bushing, spring and material characteristics. Suspension tuning also is specific to wheel and tire size. The Z71 Off Road package also includes specific appearance items, including satin-chrome-appearance trim and a distinct grille mesh design. Autoride real-time damping system Tahoe LTZ’s standard Z55 suspension includes the segment-exclusive Autoride bi-state, real-time damping system. This advanced system provides an extremely refined ride with greatly reduced body motion. It delivers instant suspension response to wheel speed, body position, vehicle speed, steering angle and braking. Autoride is a semi-active, two-position damping control system that responds in real time to road and driving conditions, based on body and wheel motion sensors. There are also steering, engine torque, brake, and speed sensors. Each corner features independent damping control. Autoride’s air-lift/auto-leveling system includes an air bladder in the shocks. An integrated air pump automatically adds air to raise and level the vehicle’s ride height when carrying passengers or a heavy payload. Conversely, air is bled from the shocks when the payload is removed, returning the vehicle to a level ride height. Rack-and-pinion steering A new hydraulic power-assisted rack-and-pinion steering system, standard on 2WD and 4WD models, provides precise steering response with optimized on-center steering feel. Steering ratios have been optimized for easy maneuverability in tight parking situations. Noise and vibration have been substantially reduced. Four-wheel disc brake system Larger, four-wheel disc brakes and an all-new ABS system from Bosch ensure Tahoe delivesr braking performance at the top of the segment. Larger , vented rotors (13 inches front/13.5 inches rear) , 50-percent stiffer dual-piston calipers, longer-life brake pads and a new apply system design result in enhanced pedal feel, reduced brake noise, predictable, linear brake response and shorter braking distances. A new, Bosch 8.0 next-generation four-channel ABS system also is standard. StabiliTrak electronic stability control GM’s sophisticated StabiliTrak electronic stability control system is standard on all Tahoe models. Partnered with the new brake system and four-channel, four-sensor electronic brake controls, the system provides more precise, controlled ABS stops, as well as enhanced traction/yaw stability. StabiliTrak uses brake control on 4WD models to precisely control the speed of each wheel and manage torque across front and rear axles. On 2WD models, the system precisely controls the speed at each wheel and manages rear differential side-to-side torque. StabiliTrak is always on for optimal control. Rollover mitigation Stabilitrak has added software for rollover mitigation. This technology adds software algorithms that use Stabilitrak sensors to proactively predict vehicle “tip up” on a flat road surface, and applies brake force to the outside front and rear wheels in order to reduce lateral force in the vehicle. This brake force intervention can help reduce the likelihood of a rollover in certain circumstances. Wheels and tires Complementing the strong, athletic styling of the 2007 Tahoe is a range of large, 17-inch standard wheels and tires, as well as available 20-inch wheels and tires. Available new P-metric tires have a nylon cap ply that enhances strength and durability. Tahoe LS and LT models offer standard 17-inch aluminum wheels with a bright finish, with different styling for the LS and LT wheels. Standard on LTZ and available on LT models are 20-inch polished aluminum wheels and touring tires. The tires for the new Tahoe’s large wheels provide excellent comfort and were developed to produce low road noise. The Z71 Off Road package includes 18-inch polished wheels and all-terrain tires.

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