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1620 East Homer Adams Pkwy Alton, IL 62002

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2015 GMC Sierra 3500HD OVERVIEW Overview Icon

2015 GMC Sierra 3500HD in Alton

Take one look inside the new 2015 GMC Sierra 3500HD and you’ll see clearly why this is the new standard in truck interiors. Sierra’s interior brings comfort, refinement, and convenience to a whole new level.

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  • Vortec® 6.0L Variable Valve Timing V8 SFI engine
  • Automatic locking rear differential
  • Front 40/20/40 split-bench seat
  • Power door locks
  • Manual camper-style mirrors
2015 GMC Sierra 3500HD Main Img

GMC Sierra 3500HD Dealer in Alton

2015 GMC Sierra 3500HD PERFORMANCE Performance Icon

2015 GMC Sierra 3500HD performance

DURAMAX DIESEL 6.6L V8 TURBO

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.

2015 GMC Sierra 3500HD performance

DURALIFE™ BRAKE ROTORS

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.

2015 GMC Sierra 3500HD performance

ALLISON 1000 SERIES TRANSMISSION

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.

2015 GMC Sierra 3500HD performance

SUSPENSION

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.

2015 GMC Sierra 3500HD APPEARANCE Appearance Icon

CARGO BOX SPRAY-IN BEDLINER A vision that stirs the senses 2015 GMC Sierra 3500HD Appearance Main Img
2015 GMC Sierra 3500HD appearance

UNMATCHED CARGO BOX INNOVATION

The 2015 GMC Sierra 3500HD shows how our “Never Say Never” approach to engineering can transform working harder into working smarter.

2015 GMC Sierra 3500HD appearance

AVAILABLE SPRAY-IN BEDLINER

Help protect your truck bed from scratches, dents, and corrosion with our high-performance bedliner that provides a durable, watertight seal.

2015 GMC Sierra 3500HD appearance

>ATTENTION TO DETAIL

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

2015 GMC Sierra 3500HD COMFORT Comfort Icon

2015 GMC Sierra 3500HD comfort

A NEW STANDARD OF QUIET

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

2015 GMC Sierra 3500HD comfort

CRAFTSMANSHIP

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

2015 GMC Sierra 3500HD comfort

COMFORT & CONVENIENCE

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.

2015 GMC Sierra 3500HD comfort

INTELLILINK

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

2015 GMC Sierra 3500HD SAFETY & WARRANTY Safety Icon

PRO GRADE PROTECTION

  • 3-year / 36,000-mile Bumper-to-Bumper Limited Warranty
  • 5-year / 100,000-mile Powertrain Limited Warranty
  • 3-year / 36,000-mile Corrosion Protection
  • 6-year / 100,000-mile Rust-Through Protection
  • 5-year / 100,000-mile Roadside Assistance
  • 2-year / 24,000-mile Maintenance
2015 GMC Sierra 3500HD Safety Main Img
2015 GMC Sierra 3500HD safety

SEGMENT-FIRST DRIVER-ALERT TECHNOLOGIES

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.

2015 GMC Sierra 3500HD safety

SAFE & CONNECTED: ONSTAR

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

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