The advanced DURAMAX diesel in the Sierra 2500 Denali HD delivers 397 hp and 765 lb-ft of torque, making it the most powerful Sierra ever. The DURAMAX Diesel engine has a strong reputation and a proven track record with nearly 1.4 million sold since 2000. Paired with the sophisticated Allison® 1000 Series Transmission with overdrive, this available powertrain also offers a maximum highway range of up to 680 miles on a single fill-up.
This ferritic nitrocarburizing technology is a GM-exclusive patented process that hardens and strengthens brakes. Duralife® protects against corrosion and can double the life of the brakes compared to conventional rotors.
The enhanced Allison 1000 is designed to handle the higher torque capability of the 6.6L DURAMAX engine, while also helping improve fuel economy and provide seamless assistance with the exhaust brake system.
Sierra 2500 Denali HD delivers a smoother ride with a fully independent coil-over-shock front suspension and 3″-wide multistage rear leaf springs, which engage progressively as the load in the bed or the hitch increases.
The 2015 GMC Sierra 2500 Denali HD shows how our “Never Say Never” approach to engineering can transform working harder into working smarter.
Keep your Sierra 2500 Denali HD looking just as good outside as it does in with our high-performance bedliner. It helps to protect your truck bed from scratches, dents, and corrosion by providing it with a durable, watertight seal.
It’s the little things that set the new Sierra 2500 Denali HD apart, taking Denali style to an unparalleled level of refinement.
Sierra 2500 Denali HD’s cabin is engineered to provide you and your passengers with a noticeably quiet interior.
Detailed craftsmanship, driver-centric design, and quality appointments make the new Sierra 2500 Denali HD a cut above other trucks.
From the exceptional storage space in the center console, to comfort and convenience features, Sierra 2500 Denali HD is designed to give you the comfort you deserve and the flexible functionality you need.
The 2015 Sierra 2500 Denali HD puts absolute control at your fingertips. The standard reconfigurable 8″ diagonal display in the instrument cluster provides an intuitive way to customize your vehicle information and media displays.
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
Sierra 2500 Denali HD’s advanced technologies pair intelligent engineering with driver-centric safety, using cameras or ultrasonic sensors to watch where you might not be looking. Sierra is the first pickup to offer this technology, which lets you know when you are approaching another vehicle too quickly or when you’ve left your driving lane.
Available on most Sierra models is a 6-month trial subscription to the OnStar12 Directions & Connections Plan. The plan includes:
- Automatic Crash Response
- Turn-by-Turn Navigation13
- Roadside Assistance