





The 2025 GMC Sierra 3500HD Pro equipped with the 6.6L Duramax Turbo-Diesel engine and the X31 Off-Road Package is a true workhorse that’s built to handle heavy-duty towing and tough terrain with ease. Whether you're heading to the job site or navigating off-road trails, this Sierra offers rugged capability, durability, and no-nonsense performance.
6.6L Duramax Turbo-Diesel V8 producing 470 horsepower and 975 lb-ft of torque
Allison 10-speed automatic transmission for smooth and powerful shifting
Heavy-duty suspension tuned for both payload and towing performance
X31 Off-Road Package includes off-road tuned shocks, skid plates, hill descent control, and a locking rear differential
Towing capacity of over 36,000 lbs when properly equipped
Diesel exhaust brake and integrated trailer brake controller for added control under load
Bold Pro Series grille and front-end styling
18-inch steel wheels with all-terrain tires
Trailering mirrors with integrated turn signals
Durable cloth seats with easy-to-clean surfaces
Front 40/20/40 split bench seat to accommodate up to 6 passengers
4-way manual driver seat with lumbar support
Ample storage with rear under-seat compartments and dual glove boxes
7-inch GMC Infotainment touchscreen display
Apple CarPlay and Android Auto compatible
HD Rear Vision Camera for safer reversing and hitching
USB ports and auxiliary input for device charging and media access
StabiliTrak electronic stability control system
Traction control and hill start assist
Adaptive cruise control
The 2025 GMC Sierra 3500HD Pro with the 6.6L Duramax and X31 Off-Road Package is ideal for drivers who need a reliable, heavy-duty truck with added off-road readiness. It’s the perfect combination of work-ready capability, diesel power, and off-road toughness, all wrapped in a professional-grade package.