2025 GMC Sierra 3500HD towing capacity
Up to 20,000 lbs with a conventional ball hitch. That rating is for this configuration: Regular Cab 2WD DRW 8' box 142 in. conventional, 6.6L Duramax Turbo-Diesel V8, 2WD. The lowest-rated configuration in the same tables is 14,500 lbs, so the answer for your vehicle depends on how it is equipped.
The top figure belongs to one specific build. Find the row that matches your engine, cab, drive and axle, and check the label on your driver's door jamb. Passengers and cargo in the truck come off what you can tow.
2025 GMC Sierra 3500HD towing capacity chart
All 14 configurations in the source, by hitch type, highest rating first. Each row links to the page it is printed on.
Conventional (ball hitch)
| Configuration | Drive | Axle | Max trailer | Needs | Source |
|---|---|---|---|---|---|
| Regular Cab 2WD DRW 8' box 142 in. conventionalfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 2WD | 20,000 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Regular Cab 4WD DRW 8' box 142 in. conventionalfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 4WD | 20,000 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Double Cab 2WD SRW 8' box 162 in. conventionalfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 2WD | 20,000 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Double Cab 2WD DRW 8' box 162 in. conventionalfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 2WD | 20,000 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Double Cab 4WD SRW 8' box 162 in. conventionalfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 4WD | 20,000 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Regular Cab 2WD SRW 8' box 142 in. conventionalfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 2WD | 14,500 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Regular Cab 4WD SRW 8' box 142 in. conventionalfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 4WD | 14,500 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 |
Fifth-wheel or gooseneck
| Configuration | Drive | Axle | Max trailer | Needs | Source |
|---|---|---|---|---|---|
| Regular Cab 2WD DRW 8' box 142 in. gooseneck/5th-wheelfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.'; footnote 5: 'Requires Max Trailering Package and Gooseneck hitch.' | 2WD | 36,000 lbs | 6.6L Duramax Turbo-Diesel V8 engine; Max Trailering Package; Gooseneck hitch | p. 119 | |
| Double Cab 2WD DRW 8' box 162 in. gooseneck/5th-wheelfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 2WD | 31,580 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Regular Cab 4WD DRW 8' box 142 in. gooseneck/5th-wheelfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 4WD | 31,500 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Regular Cab 2WD SRW 8' box 142 in. gooseneck/5th-wheelfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 2WD | 22,420 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Regular Cab 4WD SRW 8' box 142 in. gooseneck/5th-wheelfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 4WD | 22,040 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Double Cab 2WD SRW 8' box 162 in. gooseneck/5th-wheelfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 2WD | 21,900 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 | |
| Double Cab 4WD SRW 8' box 162 in. gooseneck/5th-wheelfootnote 3: 'Requires 6.6L Duramax Turbo-Diesel V8 engine.' | 4WD | 21,590 lbs | 6.6L Duramax Turbo-Diesel V8 engine | p. 119 |
Common questions
What does a 2025 GMC Sierra 3500HD need to tow 20,000 lbs?
The source lists this for the top-rated configuration: 6.6L Duramax Turbo-Diesel V8 engine.
Can a 2025 GMC Sierra 3500HD tow a fifth-wheel or gooseneck trailer?
The manufacturer publishes fifth-wheel or gooseneck ratings for it, up to 36,000 lbs. They are listed by configuration above.
Where do these numbers come from?
From 2025 GM Envolve Fleet Guide. Each row in the tables above links to the document and gives the page the figure is printed on.
Towing equipment for the 2025 GMC Sierra 3500HD
The manufacturer's tables name this equipment for some 2025 GMC Sierra 3500HD configurations. Equipment does not raise a rating. Check the Needs column for your own build before buying anything.
- Gooseneck hitch, listed for 1 of 14 configurations. See on Amazon (paid link)
Parts sold to fit this vehicle. Fitting one does not raise a rating, and the tables above say what each rating needs.
- Trailer wiring harness for the 2025 GMC Sierra 3500HD. See on Amazon (paid link)
- Trailer hitch receiver for the 2025 GMC Sierra 3500HD. See on Amazon (paid link)
As an Amazon Associate we earn from qualifying purchases. The ratings on this page come only from the documents cited.
Where these numbers come from
- 2025 GM Envolve Fleet Guide, GM Fleet. Manufacturer spec sheet. Retrieved October 3, 2026.
Page numbers count pages in the linked file, which can differ from the number printed in the corner. Report a number that looks wrong.
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