Acoustic-treated rocker covers help create our quietest idling Duramax Diesel engine ever offered in a Sierra Denali HD.
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.
Provides cooler induction air temperatures to maximize horsepower on Sierra Denali models equipped with the available Duramax Diesel engine.
Denali is loaded with premium materials such as a soft-touch instrument panel with burnished aluminum trim.
The standard heated, leather-wrapped steering wheel adds a premium touch of warmth.
Triple door seals, inlaid doors, specialized powertrain mounts and our quietest HD Duramax Diesel ever contribute to the quiet environment of the Sierra Denali HD.
The Sierra Denali HD is ready to get to work with its large center console that provides enough space for hanging files, storing folders or stowing a laptop.
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
If the system detects that a front-end collision situation is imminent while following a detected vehicle, the system alerts the driver to a potential collision. It also alerts the driver if the driver is following a detected vehicle much too closely.
The GM-patented Safety Alert Seat provides the driver the option of getting haptic seat-bottom vibration pulses instead of audible crash avoidance alerts.