GM is introducing the 2007 Chevrolet Silverado and GMC Sierra.
The Silverado and Sierra are offered with three cab styles, three cargo box lengths and several suspensions setups. The Silverado and Sierra light-duty models will be available in the first quarter of 2007. The heavy duty trucks offer more powerful gas and diesel engines. GM says highway fuel economy for models equipped with the 5.3L V8 now are estimated at more than 20 mpg for both 2WD and 4WD models. Engines range in size from the 4.3-liter, 195 hp V6, to the 6.0-liter, 367 hp V8.