For release: Sept. 27, 2007
CHEVROLET TAHOE AND GMC YUKON HYBRID: STYLED FOR EFFICIENCY
The 2008 Chevrolet Tahoe Hybrid and GMC Yukon Hybrid models both come with a number of hybrid-specific enhancements to improve aerodynamics and reduce mass, as well as readily identify them as the technologically advanced vehicles they are.
Interior
A key visual cue found on all models is the unique hybrid gauge cluster, which includes a special tachometer incorporating an Auto Stop position just above 0 rpm that indicates when the gasoline engine is in shut-down mode. Also part of the cluster, a new analog economy gauge located to the left of the tachometer helps the driver maintain the most efficient driving style.
Located midway down the center stack, the standard navigation system’s 6.5-inch full-color VGA display doubles as a monitor that shows a graphic representation of the hybrid drivetrain’s power flow. This display continuously informs the occupants how the system is sending power to the wheels from the ESS/electric motors, the gasoline engine or both. The screen also displays reverse electrical flow during regenerative braking and whether the vehicle is in two- or four-wheel-drive mode.
Exterior
While the new Tahoe and Yukon Hybrid models bear a close resemblance to their gasoline-only siblings, yet changes in their appearance are quite evident. Styling revisions have been made for both aesthetic and functional reasons. In addition to setting these models apart from other SUVs, the following exterior styling changes contribute to improved fuel economy:
- The front fascia is devoid of fog lamp and tow hook openings, while a lower air dam helps redirect air flow from underneath the vehicle to reduce turbulence and associated drag. Subtle, yet important aero tuning details around the wheel openings and other areas all contribute to a low 0.34 drag coefficient
- A slightly larger front grille opening allows increased airflow to the radiator and engine compartment, helping to cool the advanced hybrid power electronics
- The roof rack side rails have been eliminated to reduce drag and provide a clean, uninterrupted appearance
- Standard running boards have been tapered fore and aft, and incorporate body-color “spat” inserts for decreased wind resistance
- Extended D-pillar corner appliqués include sharper edges at the rear vertical corners for enhanced aerodynamic performance
- All-new rear fascia is aerodynamically optimized with sharper corners matching the extended D-pillars
- An extended rear spoiler (with integrated LED CHMSL) contributes to the vehicles’ overall aerodynamic performance
- Aerodynamically shaped rear brake lamps with LED lighting technology for reduced energy consumption
Mass reduction inside and out
Mass is an important factor in overall vehicle efficiency. Because of the slight increase in curb weight resulting from the various hybrid components, GM engineers took great efforts to reduce the mass of numerous vehicle components, which keeps the Tahoe and Yukon Hybrid models in the same test weight class as their gasoline-only twins.
On the outside, a new aluminum hood and liftgate (with fixed glass) replace the standard steel units. Substituting an aluminum front bumper beam saved additional weight, as well as using low-mass, aero-efficient 18-inch cast aluminum wheels.
On the inside, special thin-profile, lighter-weight front seats provide all the function and comfort of those found in the gasoline-only Tahoe and Yukon. Another advantage of these new seats is the additional 1.5 inches (38 mm) of second-row passenger knee room.
Additional mass was eliminated with the adoption of a tire inflator kit that takes the place of the spare wheel and tire, hoist mechanism, jack and tools found on gasoline-only models. Easy to use, the tire inflator kit is conveniently located behind the left-rear quarter trim panel in the cargo area. And, the inclusion of standard OnStar (with one-year subscription to Directions & Connections with Turn-by-Turn Navigation) adds peace of mind should the driver require roadside assistance.
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