Engines and modifications Silverado 2500 HD IV (T1XX, facelift 2024) Crew Cab Long Bed

6.6 V8 (401 Hp) Automatic

6.6 V8 (401 Hp) 4WD Automatic

6.6 Duramax TD V8 (470 Hp) Automatic

6.6 Duramax TD V8 (470 Hp) 4WD Automatic