Engines and modifications Sierra 3500HD III (GMT900) Regular Cab Long Box

6.6 Duramax TD V8 (365 Hp) 4WD SRW Automatic

6.6 Duramax TD V8 (365 Hp) 4WD DRW Automatic

6.0 V8 (360 Hp) SRW Automatic

6.0 V8 (360 Hp) 4WD SRW Automatic

6.0 V8 (360 Hp) 4WD DRW Automatic