Joining forces to make the Duramax 6.6L V-8 Turbo Diesel perform at its peak are its large radiator capacity for excellent cooling, a hood scoop induction system that provides cooler induction air temperatures to maximize horsepower, and the capable Allison 1000 6-Speed Automatic Transmission.
Paired with a 6-speed heavy-duty automatic transmission, this engine delivers 360 horsepower and 380 lb.-ft. of torque.
The efficient fuel system and acoustic treated rocker covers contribute to making it our quietest idling HD Duramax Diesel engine ever offered in a Sierra HD.
Putting a confident face forward, the distinctive grille not only captures attention, it captures air to help cool the engine while the remaining air flows smoothly around the truck.
Provide year-round, personalized comfort for the driver and front seat passenger.
The heated, leather-wrapped steering wheel adds a premium touch of warmth.
Smart exterior features set the stage for these innovative resources inside the Sierra HD All Terrain:
Sierra HD sets you up for success with the available durable soft-touch instrument panel with aluminum trim and contrast stitching.
Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and
- Two maintenance visits
- 3-year / 36,000-mile Bumper-to-Bumper Warranty
- 5-year / 60,000-mile Powertrain Warranty
- 5-year / 60,000-mile Roadside Assistance & Courtesy Transportation
- 3-month trial of OnStar Guidance Plan with a suite of emergency security and diagnostic services
- 5-year OnStar Basic Plan
The GM-patented Safety Alert Seat provides the driver the option of getting haptic seat-bottom vibration pulses instead of audible crash avoidance alerts.
Below 5 mph, the system provides distance-to-object alerts to help the driver park and avoid nearby detected objects directly ahead or behind the vehicle during low-speed maneuvering.