No other competitor in Sierra’s class offers an available fully automatic locking rear differential. The Eaton® Locker senses a difference in wheel speed of approximately 100 rpm. It locks to turn both rear wheels in unison for added traction.
B20-Diesel compatible, Generates 397 hp @ 3000 rpm and 765 lb-ft of torque @ 1600 rpm, Includes a diesel exhaust brake that helps slow the truck and helps the driver maintain the desired speed even on long, steep highway downgrades.
Electronically controlled with overdrive for smooth-shifting performance, Tow/Haul mode that reduces shift cycling for better control and improved cooling when towing or hauling heavy loads, Auto Grade Braking that automatically downshifts when needed to enable engine braking, helping to slow the vehicle on downhill grades and reduce brake wear (operates in Tow/Haul mode), Requires the Duramax® 6.6L Turbo-Diesel V8 engine.
Designed to maintain handling and ride quality while towing a trailer or carrying a load, this suspension package includes:
- 51 mm twin tube shock absorbers
- 33 mm front stabilizer bar
Provides a Black, textured, non-skid surface that helps minimize cargo shifting, Covers the entire bed interior surface below side rails, including the tailgate, front box top rail, gauge hole plugs and lower tie-down loops, Chemically bonded, the sprayed-on liner permanently bonds to the truck bed, providing a watertight seal.
Located behind the cab at the side of the truck, Gives you easy access to your tool box and cargo stored toward the front of the pickup bed, Offers a secure step up and convenient no-hands, flip-down operation, Requires Crew Cab™ models.
Requires Quicksilver Metallic, Summit White, Onyx Black, White Diamond Tricoat or Fire Red exterior color.
This standard feature enables you to maintain a minimum speed of approximately 25 mph or greater, Includes set and resume speed buttons conveniently located on the steering wheel.
The premium Bose® audio system features 6 speakers located throughout the cabin for rich, clear acoustics.
Provides year-round, personalized comfort for the driver and front seat passenger. Requires front bucket seats and perforated leather-appointed seat trim.
3-prong household-style outlet convenient for charging and powering mobile devices and games.
Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and
- Two maintenance visits
- 3-year / 36,000-mile Bumper-to-Bumper Warranty
- 5-year / 60,000-mile Powertrain Warranty
- 5-year / 60,000-mile Roadside Assistance & Courtesy Transportation
- 3-month trial of OnStar Guidance Plan with a suite of emergency security and diagnostic services
- 5-year OnStar Basic Plan
Sierra 2500 Denali HD’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.
This available feature allows you to use the audio system display to see certain stationary objects located behind your vehicle while traveling in reverse at low speeds.