Vehicle Overview

Sharing much the same underpinnings with the Chevrolet Silverado HD pickup truck, the GMC Sierra HD provides truck buyers with a bit more style and luxury — especially in Denali trim. Its light-duty sibling, the 1500, was completely redesigned for 2014, but the heavy-duty 2500HD and 3500HD variants carry on. Updated versions are expected early in 2014 as 2015 models.
New for 2014
Gas trucks now have a standard 4.10 axle ratio; a 3.73 ratio is available. A spray-on bedliner is available and a bi-fuel version of the 2500HD crew cab can run on gasoline or compressed natural gas.
Exterior Highlights

  • Regular-cab or crew-cab body styles
  • Standard or long bed
  • Available dual rear wheels (3500HD)
  • Available Z71 Off-Road Package
  • 17-inch wheels; 18- or 20-inch wheels available
  • Front tow hooks
  • Available heated and power-adjustable camper side mirrors
  • Available power sunroof

Interior Highlights

  • Seats up to six people (crew cab)
  • Many storage spaces
  • 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 backseat entertainment system

Under the Hood

  • Fully boxed high-strength-steel frame
  • 6.0-liter gas V-8 engine makes 360 horsepower and 380 pounds-feet of torque (301 hp and 333 pounds-feet of torque when running on CNG)
  • 6.6-liter Duramax turbo-diesel V-8 makes 397 hp and 765 pounds-feet of torque
  • Both engines work with a six-speed automatic transmission
  • Gas engine runs on regular while turbo-diesel accepts B20
  • 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

  • Antilock brakes
  • Electronic stability system with traction control
  • Trailer-sway control and hill-start assist
  • Available front-seat side-impact airbags
  • Available side curtain airbags
  • Available backup camera
  • Available rear parking sensors
  • Available OnStar emergency communication service