Engine information and HP/Torque curve
http://eogld.ecomm.gm.com/NASApp/domestic/graytabcontroller.jsp?graytabtype=1&rpoid=39827&vehicleid=10430§ion=engineAxle
V8, Flexible Fuel, 6.2 Liter [L9H]Incl.Incl.
(N/A w/Axle Ratio-GU4) (N/A w/Suspension Pkg-Z85 ex When in Combo w/Trailering Pkg-NHT) (Std w/Trailering Equipment-NHT) (Req's Trailering Equipment-Z82, Auto Trans-MYC & Suspension Pkg-Z60 or Z71)
Includes Power F&R Disc Brakes & HD External Engine Oil & Transmission Oil Cooling.
Suspension Pkg , High Performance [Z60] 3.23 rear end
Suspension Pkg , Off-Road [Z71] 3.23 rear end
Trailering Pkg, Max Plus Pkg-PCM[NHT] 3.73 rear end
Axle Ratio, 3.42 [GU6]
(Req's LMG 5.3L Engine on Work Truck 2WD) (Req's L9H 6.2L or LMG 5.3L Engine on LT 2WD)
Axle Ratio, 3.73 [GT4]
(Std w/Trailering Pkg-NHT) (Req's L20 4.8L Engine on 2WD Models) (Available & Included Only w/Trailering Pkg-NHT on LT 4WD & LTZ)
Automatic, 6-Spd HD w/Overdrive [MYC]
GVWR, 7000-lb [C5W]
(1659-lb Payload)
GVWR, 7300-lb [C6A]
(Payload N/A on LT & LTZ 4WD; 1509-lb Payload on Hybrid 4WD) (Available & Included Only w/Trailering Pkg-NHT on LT & LTZ 4WD)
*Data pulled from kbb.com 11-29-11
Photos are of a 2010 6.2L Un-modified and also the same engine with an Airraid MIT intake tube installed