83,688 miEngine, Vortec 5.3L V8 SFI FlexFuel with Active Fuel Management, capable of running on unleaded or up to 85% ethanol (with gas-320 hp [238.6 kW] @ 5200 rpm, 340 lb-ft of torque [459.0N-m] @ 4200 rpm, with E85 ethanol-326 hp [243.1 kW] @ 5300 rpm, 350 lb-ft of torque [472.5 N-m] @ 4400 rpm), iron block (Standard on 4WD models. 2WD models require (K5L) Heavy-Duty Trailering Package.)AutomaticFour Wheel Drive
59,229 miEngine, Vortec 5.3L V8 SFI FlexFuel with Active Fuel Management capable of running on unleaded or up to 85% ethanol (310 hp [231.1 kW] @ 5200 rpm, 335 lb-ft of torque [452.3 N-m] @ 4400 rpm), aluminum block (Standard with CK10936 models only)AutomaticFour Wheel Drive
*These estimates reflect new EPA methods beginning with 2008 models. Your actual mileage will vary depending on how you drive and maintain your vehicle. Actual mileage will vary with options, driving conditions, driving habits and vehicle's condition. Mileage estimates may be derived from previous year model.