2026 GMC Sierra 3500 HD Towing Capacity
The 2026 GMC Sierra 3500 HD tows between 14,500 and 20,000 lbs depending on engine, drivetrain, cab, axle ratio, and tow package. The highest rating — 20,000 lbs — requires the Duramax 6.6L Turbo-Diesel V8, 4x4. 29 configurations verified from the manufacturer's towing guide.
Source: 2026 GMC Sierra 3500 HD Max Trailering chart (official) · Updated 2026-06-12 · Reviewed by the CarWhere Vehicle Data Team
Every configuration, every rating
| Engine | Drive | Cab / bed | Axle | Package | Max towing | GCWR |
|---|---|---|---|---|---|---|
| Duramax 6.6L Turbo-Diesel V8 | 4x4 | Regular / Long Bed | — | — | 14,500 | 30,000 |
| 6.6L V8 Gas | 4x4 | Regular / Long Bed | — | — | 14,500 | 26,000 |
| 6.6L V8 Gas | 4x2 | Regular / Long Bed | — | — | 14,500 | 26,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x2 | Regular / Long Bed | — | — | 14,500 | 30,000 |
| 6.6L V8 Gas | 4x4 | Double / Long Bed | — | — | 16,000 | 26,000 |
| 6.6L V8 Gas | 4x2 | Double / Long Bed | — | — | 16,000 | 26,000 |
| 6.6L V8 Gas | 4x4 | Crew / Standard Bed | — | — | 16,000 | 26,000 |
| 6.6L V8 Gas | 4x4 | Crew / Long Bed | — | — | 16,000 | 26,000 |
| 6.6L V8 Gas | 4x2 | Crew / Standard Bed | — | — | 16,000 | 26,000 |
| 6.6L V8 Gas | 4x2 | Crew / Long Bed | — | — | 16,000 | 26,000 |
| 6.6L V8 Gas | 4x4 | Crew / Long Bed | — | — | 17,800 | 26,000 |
| 6.6L V8 Gas | 4x4 | Double / Long Bed | — | — | 18,000 | 26,000 |
| 6.6L V8 Gas | 4x2 | Crew / Long Bed | — | — | 18,200 | 26,000 |
| 6.6L V8 Gas | 4x2 | Double / Long Bed | — | — | 18,300 | 26,000 |
| 6.6L V8 Gas | 4x4 | Regular / Long Bed | — | — | 18,400 | 26,000 |
| 6.6L V8 Gas | 4x2 | Regular / Long Bed | — | — | 18,700 | 26,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x4 | Regular / Long Bed | — | — | 20,000 | 40,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x2 | Crew / Standard Bed | — | — | 20,000 | 30,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x2 | Double / Long Bed | — | — | 20,000 | 30,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x2 | Crew / Long Bed | — | — | 20,000 | 30,300 |
| Duramax 6.6L Turbo-Diesel V8 | 4x2 | Crew / Long Bed | — | — | 20,000 | 40,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x2 | Double / Long Bed | — | — | 20,000 | 40,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x2 | Regular / Long Bed | — | — | 20,000 | 43,500 |
| Duramax 6.6L Turbo-Diesel V8 | 4x2 | Regular / Long Bed | — | Max Trailering Package | 20,000 | 43,900 |
| Duramax 6.6L Turbo-Diesel V8 | 4x4 | Crew / Long Bed | — | — | 20,000 | 30,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x4 | Crew / Standard Bed | — | — | 20,000 | 30,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x4 | Double / Long Bed | — | — | 20,000 | 30,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x4 | Crew / Long Bed | — | — | 20,000 | 40,000 |
| Duramax 6.6L Turbo-Diesel V8 | 4x4 | Double / Long Bed | — | — | 20,000 | 40,000 |
Find YOUR exact rating + run the trailer math
This configuration tows —–— lbs depending on axle ratio and tow package.
The VIN doesn't encode the axle ratio. Pick yours below (it's on the door-jamb certification label or glovebox sticker) — or pull your window sticker free, which lists the axle ratio and tow package.
| Axle ratio | Tow package | Max towing | GCWR | |
|---|---|---|---|---|
| — | standard | 14,500 lbs | 30,000 | |
| — | standard | 14,500 lbs | 26,000 | |
| — | standard | 14,500 lbs | 26,000 | |
| — | standard | 14,500 lbs | 30,000 | |
| — | standard | 16,000 lbs | 26,000 | |
| — | standard | 16,000 lbs | 26,000 | |
| — | standard | 16,000 lbs | 26,000 | |
| — | standard | 16,000 lbs | 26,000 | |
| — | standard | 16,000 lbs | 26,000 | |
| — | standard | 16,000 lbs | 26,000 | |
| — | standard | 17,800 lbs | 26,000 | |
| — | standard | 18,000 lbs | 26,000 | |
| — | standard | 18,200 lbs | 26,000 | |
| — | standard | 18,300 lbs | 26,000 | |
| — | standard | 18,400 lbs | 26,000 | |
| — | standard | 18,700 lbs | 26,000 | |
| — | standard | 20,000 lbs | 40,000 | |
| — | standard | 20,000 lbs | 30,000 | |
| — | standard | 20,000 lbs | 30,000 | |
| — | standard | 20,000 lbs | 30,300 | |
| — | standard | 20,000 lbs | 40,000 | |
| — | standard | 20,000 lbs | 40,000 | |
| — | standard | 20,000 lbs | 43,500 | |
| — | Max Trailering Package | 20,000 lbs | 43,900 | |
| — | standard | 20,000 lbs | 30,000 | |
| — | standard | 20,000 lbs | 30,000 | |
| — | standard | 20,000 lbs | 30,000 | |
| — | standard | 20,000 lbs | 40,000 | |
| — | standard | 20,000 lbs | 40,000 |
Ratings from manufacturer towing guides; always verify against the certification placard on your door jamb. Informational — not professional advice.
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FAQ
What is the maximum towing capacity of the 2026 GMC Sierra 3500 HD?
20,000 lbs — but only in one specific configuration: the Duramax 6.6L Turbo-Diesel V8, 4x4, Double. Other configurations rate as low as 14,500 lbs. Source: 2026 GMC Sierra 3500 HD Max Trailering chart (official).
Can a 2026 GMC Sierra 3500 HD tow a 25-foot travel trailer?
A typical 25-ft travel trailer weighs 6,000–7,500 lbs loaded. Higher-rated Sierra 3500 HD configurations (up to 20,000 lbs) handle that with margin, but payload is usually the real constraint: ~750+ lbs of tongue weight plus passengers counts against payload, not the tow rating. Use the calculator above with your exact configuration and passenger count.
How do I find MY Sierra 3500 HD's exact towing capacity?
Enter the VIN above — it resolves engine, drivetrain, and cab. If your configuration's rating still depends on axle ratio or tow package (the VIN doesn't encode those), check the door-jamb certification label, or pull your window sticker free on CarWhere — it lists both.