910 LB-FT of Torque. Off-Road Ready. 2023 GMC Sierra 3500 HD AT4 Duramax.
Overview This is not a truck for the faint of heart. This is a 2023 GMC Sierra 3500 HD AT4 Crew Cab, powered by the legendary 6.6L Duramax Turbo-Diesel V8 and backed by the bulletproof Allison 10-Speed Automatic Transmission. With 60,162 km on the clock, this heavy-hauler is just broken in—and it's priced to reflect that the previous owner has already absorbed the steepest depreciation. Whether you're pulling a fifth-wheel trailer across the Rockies or hauling equipment to a remote job site, this Sierra delivers 445 horsepower and a staggering 910 lb-ft of torque .
The Duramax/Allison Difference
6.6L Duramax V8: 445 hp and 910 lb-ft of torque—effortless pulling power that flattens hills
Allison 10-Speed Automatic: Industry-leading durability, smooth shifts, and optimized gearing for heavy loads
Towing Capacity: Up to 20,000 lbs conventional, and over 36,000 lbs with a gooseneck hitch when properly equipped
Payload: North of 4,200 lbs—this truck works for a living
Fuel Tank Capacity: 36 gallons (~136 litres) for serious range between fill-ups
AT4: GMC's Off-Road Specialist The AT4 trim is designed for those who need to go beyond the pavement :
Off-Road Suspension: Rancho twin-tube shocks tuned for rough terrain
Skid Plates: Protect the undercarriage when the trail gets ugly
Eaton Automatic Locking Rear Differential: Maximum traction in mud, snow, or loose gravel
Hill Descent Control: Let the truck handle steep, slippery descents
Unique AT4 Styling: Black grille with high gloss black mesh and inserts, body-color bumpers, and aggressive stance
18" Machined Aluminum Wheels: Wrapped in LT275/70R18 all-terrain tires
Canadian-Ready Comfort & Technology
Heated and Ventilated Front Seats: Standard AT4 Premium Package comfort
Heated Rear Seats & Heated Steering Wheel: Essential for Canadian winters
Remote Start: Warm up the cab before you leave the house
Wireless Charging Pad: No cables, no clutter
Bose Premium Audio System: Concert-quality sound
13.4" Premium GMC Infotainment: Wireless Apple CarPlay/Android Auto, Google built-in
12.3" Digital Driver Information Center: Customizable display with trailering data
MultiPro Tailgate: Six functions—load, step, seat, stop, access, and more
Safety & Driver Assistance
Driver Alert Package I: Blind spot monitor, cross-traffic alert, rear parking assist
Driver Alert Package II: Lane departure warning, forward collision mitigation, automatic high beams
ProGrade Trailering System: Integrated trailer brake controller, hitch guidance with hitch view
Surround Vision Camera System: 360-degree views for confident maneuvering
Head-Up Display: Keep your eyes on the road
SWB (Short Wheelbase) Advantage The "Standard Bed" configuration (6.75 ft / 82" box) offers the perfect balance of maneuverability and utility . You get genuine 1-ton capability in a package that's easier to park and navigate in tight spaces.
The 60,162 km Smart Buy
Broken In, Not Worn Out: The Duramax is just hitting its stride
Significant Savings: Thousands less than a low-kilometre equivalent
Highway Likely: These kilometres suggest highway cruising, not severe duty
Warranty Remaining: Original powertrain coverage still applies (balance of 5 years/100,000
VSA 10374
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program
Location Alert: This vehicle is located offsite at one of our Bannister Automotive Group stores, and we can get it delivered to you. Contact us at sales@bannisterford.com or by phone at (250) 782-8589 for more information about this vehicle and our Buy From Home program