Engines and modifications Sierra 3500HD IV (GMTK2XX) Regular Cab Long Box

6.6 Duramax TD V8 (445 Hp) 4WD SRW Automatic

6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic

6.6 Duramax TD V8 (397 Hp) 4WD SRW Automatic

6.6 Duramax TD V8 (397 Hp) 4WD DRW Automatic

6.0 V8 (360 Hp) SRW Automatic

6.0 V8 (360 Hp) DRW Automatic

6.0 V8 (360 Hp) 4WD SRW Automatic

6.0 V8 (360 Hp) 4WD DRW Automatic

6.0 V8 (301 Hp) 4WD Automatic CNG