Classic Buick Pontiac Gmc

Maximum payload capacity includes weight of driver, passengers, optional equipment, and cargo. Sierra 1500 tow capacity up to 10, 700 LBS with 6-speed Transmission. Sierra 1500 based on EPA estimates of XFE 2WD models with an available 4 speed automatic Vortec 5. 3L V8 engine; Sierra Denali based on EPA estimates of 2WD models with an available 6-speed automatic Vortec 6. 2L high-output V8 engine; Sierra Hybrid based on EPA estimates of 2WD model.