Manufacturer's Suggested Retail Price (MSRP), also known as "sticker" price, is a recommended selling price that automakers give a new car that is above the invoice price paid by the dealer. It is a price that does not include any options that can be added to a particular car style. When shown as a range, the prices are starting MSRPs, without options, for multiple styles for that model.
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Best Bets get above-average mpg, class-average or better reliability, class-average or better crash-test ratings, and our recommendation.
These city and highway gas mileage estimates are for the model's standard trim configurations. Where there are optional features, packages or equipment that result in higher gas mileage, those fuel-economy estimates are not included here.
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By Cars.com Staff
April 29, 2008
Vehicle Overview GM says the Sierra Hybrid's gasoline V-8 and electric motors team up for an overall mileage improvement of 25 percent. Its only direct competitor is its corporate sibling, the Chevrolet Silverado Hybrid. The Sierra Hybrid goes on sale in late 2008 as a rear- or four-wheel-drive crew cab, both with a 6.0-liter V-8 and two electric transmission motors. Standard features that are optional on the regular Sierra include an electronic stability system, a trailering package, locking rear differential and side curtain airbags.
Exterior Alongside the Sierra Hybrid's lower panels are green stripes with "hybrid" in capital letters. There's also hybrid badging on the cab's rear window, ahead of the side mirrors and on the tailgate.
Eighteen-inch alloy wheels wear low-rolling-resistance tires, and the front air dam is slightly deeper to reduce wind resistance. The changes don't look as dramatic as they are for the Chevrolet Tahoe and GMC Yukon hybrids, both of which share drivetrains with the Sierra Hybrid.
Interior The Sierra Hybrid adopts the boxier of the Sierra's two available interiors, with a flat cowl that spans the gauges and center controls. Available features include dual-zone automatic climate control, leather seats and a navigation system.
The hybrid drivetrain's battery pack sits under the rear seat. Like in many hybrids, the navigation system has a screen that displays the flow of power between the engine, electric motor and wheels.
Under the Hood GM's two-mode hybrid system enables "full" hybrid operation with the capability to cruise on electric power at up to 30 mph. The gas engine kicks in if more acceleration is needed, as well as at higher speeds; for maximum grunt, the electric motors and gas engine work together.
At the heart of the Sierra Hybrid is a 6.0-liter V-8 that teams with GM's Electrically Variable Transmission, which integrates two 60-kilowatt electric motors. The motors draw power from a 300-volt battery pack, which recharges itself off the friction generated when you hit the brakes. The engine makes 332 horsepower and enables a towing capacity of 6,100 pounds with rear-wheel drive and 5,900 pounds with four-wheel drive — not as much as the regular Sierra's 10,500-pound maximum towing capacity, but not too shabby for a hybrid.
GM says gas mileage is up 40 percent in the city and 25 percent overall versus the gasoline Sierra.
Safety Four-wheel-disc antilock brakes, traction control and an electronic stability system are standard, as are side curtain airbags for both rows of seats.
Expert Reviews 1 of 4
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