Engine, Vortec 5.3L V8 SFI FlexFuel with Active Fuel Management, capable of running on unleaded or up to 85% ethanol (with gas - 320 hp [239 kW] at 5400 rpm, 335 lb-ft of torque [454 N-m] at 4000 rpm, with E85 ethanol - 326 hp [243 kW] at 5300 rpm, 348 lb-ft of torque [472 N-m] at 4400 rpm), aluminum block (Requires 4WD 1/2 ton models.)
Rear axle, 3.08 ratio (Requires 1/2 ton models. Not available with (K5L) Heavy-Duty Trailering Package.)
Suspension Package, Premium Smooth Ride (1/2 ton models only.)
4-wheel drive
Transfer case, active, single-speed, electronic Autotrac with rotary controls, does not include neutral. Cannot be dinghy towed. (Requires (GU4) 3.08 rear axle ratio. Not available on 2WD models, 3/4 ton models or with (K5L) heavy-duty trailering package.)
Interior@Leather-trimmed Upholstery~Interior@Leather Steering wheel trim~Interior@Automatic Climate Control Front air conditioning~Interior@Dual Front air conditioning zones~Interior@Independently Controlled Rear air conditioning~Interior@Power Adjus...