What Is the 2025 GMC Sierra HD?
The GMC Sierra 2500 HD and 3500 HD are full-size, heavy-duty pickup trucks that compete with the Ford F-Series Super Duty and Ram Heavy Duty, as well as the Chevrolet Silverado HD, the Sierra HD’s corporate stablemate. (The Sierra has a slightly more upscale look and feel than the Silverado.) Three cab sizes and two bed lengths are offered. Engine choices consist of a standard 401-horsepower, 6.6-liter V-8 and an available 470-hp, turbo-diesel 6.6-liter V-8 that makes a massive 975 pounds-feet of torque. Both engines use a 10-speed automatic transmission and can be had with rear- or four-wheel drive. Properly equipped, the 3500 HD’s maximum towing capacity hits an impressive 36,000 pounds.
What’s New on the 2025 GMC Sierra HD?
After a wide-ranging refresh last year, the Sierra HD sees only minor changes to its standard and available equipment for 2025. Adaptive cruise control with trailering is now standard in the AT4 and Denali, and a trailer-brake control is newly standard on all trims.
What Is the Towing Capacity of the 2025 GMC Sierra HD?
The Sierra HD’s maximum towing capacity ranges from 14,500 to 36,000 pounds, depending on powertrain, trim level and equipment.
How Much Does the 2025 GMC Sierra HD Weigh?
The Sierra HD’s curb weight ranges from 6,203 to 8,246 pounds, depending on body style, trim level and equipment.
What Features in the 2025 GMC Sierra HD Are Most Important?
Standard features include:
- 7-inch touchscreen multimedia system
- Wireless Apple CarPlay and Android Auto smartphone connectivity
- Bluetooth streaming audio
- Voice commands
- Trailer hitch with seven-pin electrical connector
- Cargo-area lighting
- Vinyl upholstery
- Automatic emergency braking
- Lane departure warning
Available features include:
- Digital gauge cluster
- 13.4-inch touchscreen multimedia system
- Navigation
- 360-degree camera system
- Trailering camera systems
- Head-up display
- Leather upholstery
- Heated and ventilated front seats
- Massaging front seats
- Heated steering wheel
- Power tailgate
- Multi-function tailgate
- Power-deploying side steps
- Bose premium stereo
- Tailgate audio system
- Wireless device charging
- Gooseneck trailer hitch
- Front and rear parking sensors
- Blind spot warning
- Rear cross-traffic alert
Should I Buy the 2025 GMC Sierra HD?
The GMC Sierra HD is just distinctive enough to make it worth considering over the similar Chevrolet Silverado HD — especially at the upper end of the model lineup. Its towing capacity is excellent, and available driver aids make hauling trailers safer and simpler. Its luxurious Denali trims offer distinctive upscale styling and some exclusive features, and the off-road-oriented AT4 versions add functional equipment like all-terrain tires, skid plates and unique chassis hardware for improved rough-terrain prowess.
