Vehicle Overview

Sharing much of the same underpinnings with the Chevrolet Silverado heavy-duty pickup truck, the GMC Sierra HD provides truck buyers with a bit more style and luxury — especially in Denali trim. Competitors include the Ford F-Series Super Duty and Ram 2500 and 3500.
New for 2015
The Sierra 2500HD and 3500HD have been redesigned and have new styling inside and out.

Below is a list of highlighted features and not an exhaustive list. Features are standard unless otherwise noted.

Exterior Highlights

  • Regular-cab, double-cab and crew-cab body styles
  • Standard or long bed
  • Available dual rear wheels (3500HD)
  • Available All Terrain Package
  • 17-inch wheels; 18- or 20-inch wheels available
  • Available heated and power-adjustable camper-style side mirrors
  • Available power sunroof

Interior Highlights

  • Seats up to six people in certain versions
  • Vinyl, cloth or leather upholstery
  • Front bench or bucket seats
  • Available Bluetooth connectivity
  • Available navigation system
  • Available power-adjustable pedals
  • Available power-sliding rear window
  • Available OnStar with 4G LTE and Wi-Fi hot spot
  • Available backseat entertainment system with 9.2-inch screen

Under the Hood

  • 360-horsepower, 6.0-liter gas V-8 engine makes 380 pounds-feet of torque (301 hp and 333 pounds-feet of torque when running on CNG in properly equipped trucks)
  • Available 397-hp, turbo-diesel 6.6-liter V-8 makes 765 pounds-feet of torque
  • Both engines work with a six-speed automatic transmission
  • Turbo-diesel has an exhaust-brake system that provides greater control on downhill grades and reduced brake-pad wear
  • Rear- or four-wheel drive

Safety Features

  • Required in every new car: front airbags, antilock brakes and an electronic stability system
  • Trailer-sway control and hill start assist
  • Available backup camera
  • Available front and rear parking sensors
  • Available lane departure warning
  • Available forward collision warning