Duramax 6.6L Turbo Diesel V8 engine

  • Available on Sierra Denali HD models
  • 765 lb-ft of torque @ 1600 rpm and 397 hp @ 3000 rpm
  • Requires the durable Allison® 1000 6-speed automatic transmission
  • B20-Diesel compatible

Includes exhaust brake, heavy-duty dual, 730 cold-cranking-amp battery and engine block heater