The 135-inch, short-wheelbase, rear-wheel-drive version is powered by a 4.3-liter V6 and 4-speed automatic, while a 4.8-liter Vortec V8 FlexFuel unit producing 280 hp and 295 pound-feet of torque is available, as is a 6.6-liter Duramax turbodiesel. Each is mated to a heavy-duty 6-speed automatic. In all-wheel-drive configuration, a 5.3-liter V8 rated at 310 hp and 334 lb-ft of torque is the base engine, paired with a 4-speed automatic.
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