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

6.6 Duramax TD V8 (397 Hp) Automatic

6.6 Duramax TD V8 (397 Hp) 4WD Automatic

6.0 V8 (360 Hp) Automatic

6.0 V8 (360 Hp) 4WD Automatic

6.0 V8 (301 Hp) Automatic CNG