The 2026 GMC Sierra 2500 HD Turbo-Diesel V8 is a powerful heavy-duty pickup truck designed to deliver excellent performance in towing, hauling, and off-road driving. It is equipped with a 6.6-liter Duramax turbo-diesel V8 engine that produces 470 horsepower and an impressive 975 lb-ft of torque, paired with an Allison 10-speed automatic transmission.
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Basic Info |
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Engine |
6.6L Turbo-Diesel V8 (Duramax) |
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Transmission |
Allison® 10-Speed Heavy-Duty Automatic |
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Vehicle Type |
3/4-Ton Heavy-Duty Full-Size Pickup Truck |
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No. of Doors |
4 Doors |
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Status |
Released |
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Release Date |
2026 Model Year |
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Fuel Type |
Ultra-Low Sulfur Diesel |
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Colors |
Summit White, Onyx Black, Volcanic Red Tintcoat, Titanium Rush Metallic, Sterling Metallic, Downpour Metallic, Vader Chrome |
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Dimensions & Weight |
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Curb Weight |
6,738–7,800 lbs |
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Overall Height |
79.9–80.5 in |
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Overall Length |
241.2 in |
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Overall Width |
81.8 in |
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Wheelbase |
141.5 in / 149.0 in / 159.0 in / 172.0 in |
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Ground Clearance |
10.16 in |
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Shoulder Room |
Front: 66.0 in / Rear: 64.8 in |
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Headroom |
Front: 43.0 in / Rear: 39.8–40.1 in |
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Legroom |
Front: 44.5 in / Rear: 43.4 in |
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Hip Room |
Front: 61.1 in / Rear: 60.2 in |
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Front Track |
68.6 in |
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Rear Track |
67.6 in |
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Engine & Battery |
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Power |
470 hp @ 2,800 rpm |
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Torque |
975 lb-ft @ 1,600 rpm
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Drivetrain |
Rear-Wheel Drive (RWD) / Part-Time 4-Wheel Drive (4WD) |
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Battery Type |
Dual Heavy-Duty Batteries |
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Battery Capacity |
NA |
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Wheels & Tires |
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Tire Size |
LT245/75R17 / LT275/70R18 / LT275/65R20 / 35-inch Goodyear® Territory MT (AT4X) |
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Wheel Size |
17-inch, 18-inch, or 20-inch |
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Wheel Type |
Machined Aluminum, High Gloss Black, or Ultra-Bright Machined Aluminum |
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Steering |
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Turning Diameter |
47.0–55.0 ft |
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Steering Type |
Heavy-Duty Hydraulic Power Recirculating Ball Steering |
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Transmission |
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Gearbox |
10-Speed |
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Transmission Type |
Allison® 10-Speed Heavy-Duty Automatic with Tow/Haul Mode, Auto Grade Braking & Integrated PTO Option |
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Performance |
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Top Speed |
Around 98 mph |
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Acceleration 0–100 km/h (0–62 mph) |
6.5 seconds |
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Fuel Economy |
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City |
NA |
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Highway |
NA |
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Combined |
NA |
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Capacities |
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Seating Capacity |
3 to 6 Passengers |
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Cargo Volume |
NA |
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Maximum Towing Capacity |
Up to 20,000 lbs |
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Fuel Tank Capacity |
36.0 Gallons Standard |
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Suspension |
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Front |
Independent Short-Long Arm (SLA) with Torsion Bars & Heavy-Duty Anti-Roll Bar |
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Rear |
Hypoid Heavy-Duty Rear Drive Axle with 3-Stage Multi-Leaf Springs |
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Brakes |
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Brake Type |
4-Wheel Anti-Lock Ventilated Disc Brakes w/ Hydro-Boost & Integrated Exhaust Brake |
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Brake System |
4-Wheel ABS with Hydro-Boost Assist, Integrated Trailer Brake Controller & Exhaust Brake |
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Exterior Features |
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Alloy Wheels |
Yes |
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Sun/Moon Roof |
No |
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Spoiler |
No |
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Front Camera |
Yes |
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Rear Camera |
Yes |
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Roof Antenna |
Yes |
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Rear Parking Aid |
Yes |
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Intermittent Wipers |
Yes |
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Power Folding Mirrors |
Yes |
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LED Headlights |
Yes |
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Interior Features |
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Cruise Control |
Yes |
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Alarm |
Yes |
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Keyless Entry |
Yes |
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Adjustable Steering Wheel |
Yes |
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Parking Aid |
Yes |
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Power Mirrors |
Yes |
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Power Windows |
Yes |
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Vanity Mirror |
Yes |
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Power Steering |
Yes |
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Keyless Start |
Yes |
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Power Door Locks |
Yes |
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Cup Holders |
Yes |
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Glove Box |
Yes |
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Digital Display |
Yes |
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Heated Seats |
Yes |
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Heated Steering Wheel |
Yes |
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Climate Control |
Yes |
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Normal/Sport Modes |
Yes |
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Multi-Function Steering |
Yes |
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Trip Computer |
Yes |
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Anti-Theft System |
Yes |
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Entertainment Features |
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Android Auto |
Yes |
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Apple CarPlay |
Yes |
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AM/FM Stereo |
Yes |
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MP3 Player |
Yes |
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Bluetooth |
Yes |
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Navigation System |
Yes |
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Voice Command |
Yes |
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WiFi Hotspot |
Yes |
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LCD |
Yes |
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Speakers Front |
Yes |
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Speakers Rear |
Yes |
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Safety Features |
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Brake Assist |
Yes |
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Electronic Stability Control |
Yes |
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Child Safety Lock |
Yes |
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Lane Departure Warning |
Yes |
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ABS |
Yes |
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Driver Airbags |
Yes |
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Passenger Airbags |
Yes |
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Pre-Collision System |
Yes |
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Pedestrian Detection |
Yes |
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Defogger |
Yes |
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Road Sign Assist |
No |
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Smart Stop Technology |
Yes |
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Automatic High Beams |
Yes |
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