Boulder truck enthusiasts seeking uncompromising capability will be impressed by the commanding performance of the 2025 GMC Sierra 3500 HD Chassis Cab. With your choice of the brawny 6.6-liter V8 gas engine delivering 401 horsepower and 464 pound-feet of torque or the muscular 6.6-liter Duramax Turbo-Diesel V8 cranking out 470 horsepower and 975 pound-feet of torque, this heavy-duty GMC pickup is ready to take on the toughest jobs around Longmont.
Mated to an advanced Allison 10-speed automatic transmission, the Sierra 3500 HD Chassis Cab delivers smooth, responsive power for conquering challenging terrain and hauling massive payloads. The standard auto-locking rear differential optimizes traction, while StabiliTrak with Proactive Roll Avoidance and integrated trailer sway control provides stable handling. Available in Pro and SLE trims with 2WD or 4WD, the Sierra HD Chassis Cab is a true workhorse. Browse our new GMC Sierra 3500 HD Chassis Cab inventory to find your ultimate performance partner in Boulder today!