2023 GMC Sierra 2500HD Crew Cab 2WD/4WD Long Bed with 6.6L Duramax Turbo Diesel V8
⚠ Pending verification
Figures were extracted from the source below and are pending confirmation against the OEM towing guide.
Source: OEM towing guide — [PDF] 2023 FEATURES, SPECS AND OPTIONS - GMC · retrieved 2026-07-01
Max Towing Capacity
18,510
lbs / 8,396 kg
Hitch Class
Gooseneck / 5th-wheel
Engine Variants
2 variants
Trim Notes
2500 Regular Cab 2WD Long bed, 6.6L Duramax Turbo Diesel V8, fifth-wheel/gooseneck hitch
⚠ Important
Peak 18,510 lb is 5th-wheel/gooseneck on the Reg Cab 2WD Long bed diesel; near-identical conventional max 18,500 lb. (2024 rose to 22,430 with the updated HD powertrain.)
◆ Gear you may need
Always confirm against your door-jamb sticker & OEM towing guide before hauling. Ratings vary by exact configuration.
Different configuration? Look it up
The 18,510 lbs figure above is the properly-equipped maximum for this model year. For a specific trim, engine, or drivetrain, run your exact setup through the live tool:
Prose overview
The 2023 GMC Sierra 2500HD carries a maximum towing capacity of 18,510 lbs when properly equipped, paired with a Gooseneck / 5th-wheel hitch. As with every truck and SUV, the rating swings by engine, drivetrain, cab and bed configuration, and rear axle ratio — so two 2023 GMC Sierra 2500HDs on the same lot can be rated thousands of pounds apart. Match your trailer to the lowestrelevant limit (towing capacity, payload, GCWR, and hitch rating), and verify against the sticker inside the driver's-side door jamb.
Related tow ratings
2023 GMC Sierra 2500HD towing FAQ
What is the maximum towing capacity of a 2023 GMC Sierra 2500HD?
A properly equipped 2023 GMC Sierra 2500HD is rated to tow up to 18,510 lbs. This maximum applies only to specific engine, axle, and tow-package combinations — most trims tow less.
What hitch class does the 2023 GMC Sierra 2500HD need?
Based on its rated capacity, the 2023 GMC Sierra 2500HD typically pairs with a Gooseneck / 5th-wheel hitch. Always match the hitch to your loaded trailer weight and never exceed the vehicle's rated capacity.
Do I need a brake controller to tow with a 2023 GMC Sierra 2500HD?
Most states require trailer brakes — and a brake controller — for trailers over 3,000 lbs loaded. A brake controller syncs the trailer's brakes with the vehicle's for safe, controlled stops.
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