The advanced DURAMAX diesel in the Sierra 3500HD 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.
For fast starts in cold weather, quiet operation and maximum efficiency, the direct injection system helps Sierra HD with the available DURAMAX diesel engine start in as little as 3 seconds at -40ºF. It operates at nearly 30,000 psi to turn heavy diesel fuel into a fine mist, delivering low emissions and great power.
Sierra 3500HD delivers a smooth 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 3500HD shows how our “Never Say Never” approach to engineering can transform working harder into working smarter.
Help protect your truck bed from scratches, dents, and corrosion with our high-performance bedliner that provides a durable, watertight seal.
It’s the little things that take the new Sierra 3500HD to an unparalleled level of refinement. Sierra 3500HD features design details such as:
- Projector headlamps
- LED signature front lighting (SLT)
- Chrome grille surround
Sierra 3500HD’s cabin is engineered to provide you and your passengers with a noticeably quiet interior. Features that help reduce cabin noise include:
- New inlaid door design
- Triple door seals that block outside noise
- Hydraulic powertrain and body mounts
Detailed craftsmanship, driver-centric design, and quality appointments make the new 2015 Sierra 3500 Denali HD a cut above other trucks. Available features include:
- Durable, soft-touch instrument panel materials and door trim
- Aluminum trim on instrument panel, steering wheel, and center console
From the exceptional storage space in the center console to comfort and convenience features, Sierra 3500HD is designed to give you the comfort you deserve and the flexible functionality you need.
The available 8″ diagonal Color Touch Radio with next generation IntelliLink6 lets you customize your media and connect to your world. Standard on SLE and SLT Double and Crew Cabs, features include:
- 8” diagonal customizable color touch screen
- Natural Language voice command
- My Media connects media libraries from multiple devices
Sierra 3500HD’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.
Standard on most Sierra models is a 6-month trial subscription to the OnStar13 Directions & Connections Plan. The plan includes:
- Automatic Crash Response
- Turn-by-Turn Navigation14
- Roadside Assistance