Engines and modifications III (GMT900, facelift 2011) Crew Cab Standard Box

6.6 Duramax TD V8 (397 Hp) SRW Automatic

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

6.0 V8 (360 Hp) SRW Automatic

6.0 V8 (360 Hp) 4WD SRW Automatic