Engines and modifications IV (T1XX) Crew Cab Standard Bed

6.6 V8 (401 Hp) SRW Automatic

6.6 V8 (401 Hp) 4WD SRW Automatic

6.6 Duramax V8 (445 Hp) SRW Automatic

6.6 Duramax V8 (445 Hp) 4WD SRW Automatic