4.3L V-6, rated 195 hp and 260 lb.-ft. of torque. Standard on WT regular cab and 2WD extended cab trucks.
4.8L V-8, rated 295 hp and 305 lb.-ft. of torque. Standard on WT 4WD extended cab, LT regular cab and extended cab trucks, and WT and LT crew cab trucks.
Two different 5.3L FlexFuel V-8, E85-capable, rated 315 hp and 338 lb.-ft. of torque. Available on all trucks.
5.3L V-8, aluminum block, rated 315 hp and 338 lb.-ft. of torque. Available on crew cab 4WD trucks.
5.3L V-8, iron block, rated 315 hp and 338 lb.-ft. of torque. Standard on LT and LTZ trucks; available on all other trucks.
6.0L V-8, rated 367 hp and 375 lb.-ft. of torque. Available on LT and LTZ extended and crew cabs--part of the maximum trailering package.