Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
GVWR, 11,700 lbs. (5307 kg) with single rear wheels (Included and only available with model TK30943 model and (L8T) 6.6L V8 gas engine. Requires single rear wheels.)
Air filter, heavy-duty
Air filtration monitoring
Transfer case, two-speed electronic shift with push button controls (Requires 4WD models.)
Rear axle, 3.08 ratio (Standard and only available on (L83) 5.3L EcoTec3 V8 engine. Not available with (RD3) 20" bright machined aluminum wheels, (NZP) 20" chrome clad aluminum, (RD5) 20" polished aluminum, (NZH) 20" ultra bright machined aluminum with painted accents or 22" LPO wheels.)
Pickup box
GVWR, 7200 lbs. (3266 kg) (Requires Crew Cab or Double Cab 4WD models and (L83) 5.3L EcoTec3 V8 engine or (L86) 6.2L EcoTec3 V8 engine.)