Four wheel drive
Cooling, external engine oil cooler
Cooling, auxiliary external transmission oil cooler
Trailer brake controller, integrated
Steering, Recirculating Ball with smart flow power steering system
Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
Brake lining wear indicator
Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
Suspension Package (Not available with (X31) Off-Road Package.)
Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine. Not included with (ZW9) pickup bed delete.)
Air filtration monitoring
Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
Transfer case, two-speed, electronic shift with push button controls (Requires 4WD models.)
Air filter, heavy-duty
Auto-locking rear differential