29,000 miEngine, 6.2L V8 with Active Fuel Management Spark Ignition Direct Injection (SIDI) and Variable Valve Timing (VVT), includes aluminum block construction (420 hp [313.2 kW] @ 5600 rpm, 460 lb-ft of torque [621 N-m] @ 4100 rpm)AutomaticFour Wheel Drive
108,920 miEngine, Vortec 5.3L V8 SFI FlexFuel with Active Fuel Management, capable of running on unleaded or up to 85% ethanol (320 hp [238.6 kW] @ 5200 rpm, 340 lb-ft of torque [459.0 N-m] @ 4200 rpm), iron block (Standard on 4WD models. 2WD models require (K5L) Heavy-Duty Trailering Package.)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.