Four wheel drive
Differential, heavy-duty locking rear
Cooling, external engine oil cooler
Cooling, auxiliary external transmission oil cooler
Trailer brake controller, integrated
Steering, Recirculating Ball with smart flow power steering system
Suspension Package
Durabed, pickup bed
Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
Air filter, high-capacity
Brake lining wear indicator
Transfer case, two-speed electronic shift with push button controls (Requires 4WD models.)
Capless Fuel Fill (Requires (L8T) 6.6L V8 gas engine. Not available with (ZW9) pickup bed delete.)
Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine. Not available with (L5P) Duramax 6.6L Turbo-Diesel V8 engine.)
Air filtration monitoring
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.)
Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section