Engine, Vortec 6.0L V8 SFI (323 hp [240.8 kW] at 4600 rpm, 373 lb-ft of torque [503.6 N-m] at 4400 rpm) (Standard on the *G33903 models. Available on *G33503 or *G33803 model. Includes external oil cooler. Reference the Engine/Axle page for availability.)
Rear Axle, 4.10 Ratio (Required on all models with (LY2) Vortec 4.8L V8 SFI engine and (LY6) Vortec 6.0L V8 SFI engine.)
Body, standard
Brake/transmission shift interlock for automatic transmissions
Transmission oil cooler, external (Included with (LMM) Duramax 6.6L Turbo Diesel V8 engine, (LY6) Vortec 6.0L V8 engine, (YF1) RV Package and (C7N) 12,300 lbs. (5579 kg) GVWR. Required when (GT5) 4.10 rear axle ratio is ordered.)