Engines and modifications Sierra 1500 III (GMT900) Extended Cab Long Box

6.2 Vortec V8 (403 Hp) Automatic FlexFuel

6.2 Vortec V8 (403 Hp) 4WD Automatic FlexFuel

6.0 Vortec V8 (367 Hp) Automatic

6.0 Vortec V8 (367 Hp) 4WD Automatic

5.3 Vortec V8 (320 Hp) Automatic FlexFuel

5.3 Vortec V8 (320 Hp) 4WD Automatic FlexFuel

5.3 Vortec V8 (315 Hp) 4WD Automatic

4.8 Vortec V8 (302 Hp) Automatic FlexFuel

4.8 Vortec V8 (302 Hp) 4WD Automatic FlexFuel

4.8 Vortec V8 (295 Hp) Automatic

4.8 Vortec V8 (295 Hp) 4WD Automatic