Duramax® 6.6L Turbo-Diesel V8 engine

This B20-Diesel compatible powerhouse:

  • Generates 397 hp @ 3000 rpm and 765 lb-ft of torque @ 1600 rpm
  • Includes a diesel exhaust brake that helps slow the truck to help the driver maintain the desired speed even on long, steep highway downgrades
  • Requires the Allison® 1000 6-speed automatic transmission, the 3.73 rear axle ratio and the engine block heater
  • Included with Duramax® Plus Package on Crew Cab™, LTZ models