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2015 GMC Sierra 2500HD / Denali

Not all work is created equal, and the new 2015 GMC Sierra 2500HD has no equal either. It starts with bold, updated styling on the outside and premium materials and updated electronics within. That, combined with the iconic performance GMC is known for, makes Sierra 2500HD the go-to truck for getting the job done.

NEW FOR 2015

  • Maximum conventional trailering capacity of 14,000 lbs4
  • Best-in-class 3/4-ton maximum available payload5
  • Fully boxed frame
  • Box capability
  • Advanced engine cooling
  • Quiet interior with all-day comfort
  • Integrated trailer brake controller, StabiliTrak, and diesel exhaust brake for confident towing
  • The industry’s best pickup coverage comes standard on the Sierra 2500HD
  • 2-year/24,000-mile scheduled maintenance6 (includes DEF)


Features based on 2500HD 1WT model unless otherwise noted.

Safety and Security

  • Single-stage frontal and thorax side-impact air bags7, driver and front passenger, and head curtain side-impact air bags for front and rear outboard seating positions
  • StabiliTrak stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and Hill Start Assist
  • Tire Pressure Monitoring System8 (vehicles under 10,001-lb. GVWR9)


  • Reclining front 40/20/40 split-bench seat; vinyl or cloth
  • Driver Information Center with 3.5-inch diagonal monochromatic display
  • Cruise control
  • Air conditioning
  • Power door locks
  • Power windows (Double and Crew cabs)
  • Tilt-wheel adjustable steering column
  • Audio system includes 4.2" diagonal color Driver Information Center and AM/FM stereo with USB ports10, auxiliary jack, and SD card slot.

Engine Availability

  • Vortec 6.0L V8 with up to 360 horsepower and E85 FlexFuel11 capability on pickup models
  • Duramax 6.6L V8 Turbo Diesel with 397 horsepower, 765 lb-ft of torque; B20-Diesel compatible
  • 6.0L V8 SFI Gaseous CNG (Compressed Natural Gas), with hardened valves and valve seats


  • 6-speed automatic, heavy-duty, electronically controlled transmission with overdrive and Tow/Haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking
  • 4-wheel disc antilock brake system
  • Heavy-duty battery with rundown protection and retained accessory power
  • External auxiliary transmission oil cooler
  • External engine oil cooler


  • Intermittent windshield wipers
  • Foldaway rearview mirrors
  • All-season tires
  • Pickup box; wideside with top tailgate and bed rail protection caps
  • Cargo tie-downs (4), movable upper
  • Front frame-mounted recovery hooks
  • CornerStep rear bumper (Requires (E63) pickup box)
  • Cargo area lamps; cab mounted with switch on center switch bank
  • Spare tire lock



Options are available on certain models only. See your Ordering Guide for details.

  • Cloth or leather seating surfaces
  • Three audio system options up to/including 8" Diagonal Color Touch Navigation12 with IntelliLink13, AM/FM/SiriusXM14 (with 3-month trial), USB ports, auxiliary jack, SD card slot, Bluetooth15, Bose® sound system
  • OnStar® 6-month Directions & Connections Plan16 with Turn-by-Turn Navigation
  • Rear-Vision Camera System with dynamic guide lines
  • Bi-Fuel Compressed Natural Gas CNG fuel system; operates on both gasoline and CNG: Not E85 compatible.
  • Allison® 1000 6-speed automatic transmission (with Duramax)
  • Upfitter switches – 4
  • LED lighting in cargo box with switch on center switch bank
  • Automatic locking rear differential
  • Trailer brake controller, integrated
  • Outside mirror options: camper, power, heated, curb-tilt
  • Driver Alert Package includes Lane Departure Warning, Forward Collision Alert, Safety Alert Driver Seat, and Front and Rear Park Assist
  • 110-volt AC power outlet
  • EZ-Lift and Lower Tailgate
  • Ultrasonic Rear or Front/Rear Parking Assist
  • Trailering equipment
  • Snow Plow Prep Package
  • Pickup Box Delete
  • Spray-in Bedliner (Not available with 6.0L V8 SFI Gaseous CNG (compressed natural gas) engine. Not available with any ship thru code.)