2025 GMC Sierra HD

This pickup is packed with features that make it practical and versatile. The CornerStep rear bumper makes it easy to climb into the bed, while the locking tailgate and 12 fixed cargo tie-downs that handle up to 500 pounds each keeps your cargo secure. The cab-mounted cargo area lamps provide extra visibility when working in low light conditions, but you can also add available cargo bed LED lighting.

Under the hood, the Sierra HD packs a serious punch. The standard 6.6L V8 gas engine delivers 401 hp/464 lb-ft of torque, giving you plenty of power for towing and hauling. But if you need even more muscle, the available 6.6L Duramax® turbo diesel engine cranks out a whopping 470 hp/975 lb-ft of torque. This engine can tow up to 21,870 pounds1 on 2500 trims and a mind-blowing 36,000 pounds1 on 3500 trims.

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¹ Max towing varies depending on trim level and proper equipment. Maximum trailering ratings are intended for comparison purposes only. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner's Manual. The trailering capacity of your specific vehicle may vary. The weight of passengers, cargo, and options or accessories may reduce the amount you can trailer.

LUXURIOUS MATERIALS

Sierra HD Denali Ultimate's Alpine Umber interior features full-grain leather seating, plaited contrast stitching, and embossed and laser-etched topographical map patterns of Mt. Denali's summit.

LED PROJECTOR HEADLAMPS AND SIGNATURE LIGHTING

LED projector headlamps with striking animated sequences help enhance Sierra Heavy Duty's impressive exterior design.

13.4" DIAGONAL CENTER TOUCHSCREEN

This available tablet-style touchscreen — the largest in its class* — is the customizable, high-tech centerpiece of the cabin.

SIERRA HD PRO SAFETY

Every GMC Sierra 2500 HD and GMC Sierra 3500 HD trucks include active safety and driver assistance technologies that help while driving and trailering. Sierra HD Pro Safety includes:

• Forward Collision Alert
• Following Distance Indicator
• Front Pedestrian Braking
• IntelliBeam
• Lane Departure Warning
• Buckle to Drive
• Automatic Emergency Braking

DURAMAX 6.6L TURBO-DIESEL V8 WITH ALLISON 10-SPEED AUTOMATIC TRANSMISSION

DURAMAX 6.6L TURBO-DIESEL V8 WITH ALLISON 10-SPEED AUTOMATIC TRANSMISSION

AVAILABLE ON PRO | SLE | SLT | AT4 | DENALI | AT4X

• 975 lb.-ft. of torque and 470 horsepower
• A broad band of power and torque over the entire operating speed range
• Exhaust brake to improve control when towing
• Potent turbo vane actuator and tough valve springs