I recently tested the 2015 Silverado 1500 CC Z71 4x4 with the 6.2L against similar Ford, Ram and Tundra V8 packages. Silverado bested them in every category and felt far more planted when towing 6,500 pounds sans a WD hitch. Quietest cab interior, too. GM 6.2L acceleration is flat-out strong. It also delivered best towing and unloaded highway mpg between the three. (I also tested the Sierra version with Max Tow package…didn't like ride without a trailer in-tow.)