Engine, Vortec 5300 V8 SFI Flex-Fuel, capable of running on unleaded or up to 85% ethanol (295 HP [219.7 kW] at 5200 rpm, 330 lb.-ft. [445.5 N-m] at 4000 rpm) (Requires (FE9) Emissions, Federal requirements. Requires 1/2 ton Models)
Rear axle, 3.73 ratio (Upgradeable to (GT5) Rear axle, 4.10 ratio)
Battery, heavy-duty, 600 cold-cranking amps, includes rundown protection and retained accessory power