The 2026 GMC Sierra 2500 HD is a 3/4-ton (heavy-duty) pickup truck from GMC, designed to strike a balance between heavy-duty towing capability, commercial utility, and advanced, luxurious technology. It is available in several trim levels—Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate—and comes in Regular Cab, Double Cab, and Crew Cab configurations. Furthermore, it offers a choice of cargo bed lengths: standard (6 feet 9 inches) or long (8 feet).
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Basic Info |
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Engine |
6.6L Overhead Valve (OHV) V8 Petrol |
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Transmission |
Allison® 10-Speed Automatic |
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Vehicle Type |
3/4-Ton Heavy-Duty Full-Size Pickup Truck |
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No. of Doors |
2 Doors |
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Status |
Released |
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Release Date |
2026 Model Year |
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Fuel Type |
Unleaded Gasoline |
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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 |
235.5 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: 35.2 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 |
401 hp @ 5,200 rpm |
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Torque |
464 lb-ft @ 4,000 rpm
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Drivetrain |
Rear-Wheel Drive (RWD) / Part-Time 4-Wheel Drive (4WD) |
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Battery Type |
Single 720 CCA Battery |
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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) |
7.8 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 Passengers |
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Cargo Volume |
NA |
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Maximum Towing Capacity |
18,500 – 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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