Index · GMC · Sierra 2500HD
2026 GMC Sierra 2500HD
GMC lists a maximum of 22,390 lb on a gooseneck hitch for the 2026 GMC Sierra 2500HD in its 2026 Sierra 2500 trailering charts. That rating requires the Duramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell. Other cited maximums for the 2026 GMC Sierra 2500HD are 20,000 lb on a conventional hitch and 22,390 lb on a fifth-wheel hitch. Across 3 manufacturer chart rows for 2026, ratings run conventional 20,000 lb; fifth-wheel 22,390 lb; gooseneck 22,390 lb; the engine, cab, axle ratio and package on your truck decide its number.
The build table for 2026 is not transcribed. This page will not multiply trims, cabs, and engines into trucks the order guide did not list.
| Hitch | Cited maximum | Configuration | Source grade |
|---|---|---|---|
| Conventional | 20,000 lb | Duramax 6.6L, Crew Cab standard bed 2WD, 30,000 lb GCWR and Max Trailering Package; other qualifying Crew Cab cells also reach this maximum. | OEM chart |
| Gooseneck | 22,390 lb | Duramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell. | OEM chart |
| Fifth-wheel | 22,390 lb | Duramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell. | OEM chart |
Source: GMC, 2026 Sierra 2500 trailering charts, Pages 1–2, conventional and fifth-wheel/gooseneck tables and footnotes. Selected cells visually checked against the original PDF. This is not a complete transcription of all rows. Bed, wheel, hitch and package distinctions are retained.
Spec sheet
12 of 25 fields cited; 1 estimate. Field index
Cited fields may cover selected trims or only part of a measurement. Read the configuration and source beside each value; a cited field does not mean every version is researched.
Towing
- Conventional maximum
- 20,000 lb. Duramax 6.6L, Crew Cab standard bed 2WD, 30,000 lb GCWR and Max Trailering Package; other qualifying Crew Cab cells also reach this maximum.GMC source
- Gooseneck maximum
- 22,390 lb. Duramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell.GMC source
- Fifth-wheel maximum
- 22,390 lb. Duramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell.GMC source
- Tongue or pin load
- 2,000 lb tongue at the 20,000 lb conventional maximum. 3,359 lb pin at the 22,390 lb gooseneck maximum. 3,359 lb pin at the 22,390 lb fifth-wheel maximum. Illustration at 10 percent conventional and 15 percent in-bed, not a measured load or recommendation. Follow the trailer and vehicle instructions; actual load may be higher.Estimate
- Weight distribution
- Not transcribed for this model year.
- Trailer frontal area
- Not transcribed for this model year.
Weights
- Payload
- Detailed cab table maximum: 4,049 lb, Regular Cab 2WD long box with gas 6.6L V8 and specified wheels. The guide's overview instead prints 4,064 lb; this discrepancy remains unresolved. Use the vehicle load label.General Motors source — PDF page 132: Payload
- GCWR
- 30,000 lb (Regular Cab, Long, axle n/a); 30,000 lb (Crew Cab, Standard, axle n/a)GMC source
- GVWR
- Fleet table's cab/drive maxima range from 10,750 to 11,550 lb. Highest listed: Crew Cab 4WD long box. Other available GVWR packages are not established by this table.General Motors source — PDF page 132: GVWR
- Front GAWR
- Not transcribed for this model year.
- Rear GAWR
- Not transcribed for this model year.
- Curb weight
- Not transcribed for this model year.
Body
- Wheelbase
- Rounded fleet-guide values: Regular Cab long box 142 in; Double Cab standard/long 149 / 162; Crew Cab standard/long 159 / 172. Check cab/box availability for 2500 versus 3500.General Motors source — PDF pages 131–133: Wheelbase
- Bed length
- Nominal 6-ft 9-in or 8-ft box, depending on cab and series. Exact inside floor lengths are not supplied in this table.General Motors source — PDF pages 131–133: Bed length
- Bed width and depth
- Not transcribed for this model year.
- Cab-to-axle
- Not transcribed for this model year.
- Overall length, width, height
- Not transcribed for this model year.
- Ground clearance and angles
- Not transcribed for this model year.
- Fifth-wheel clearance
- Not transcribed for this model year.
Power
- Engine, horsepower, torque
- 6.6L gasoline V8: 401 hp / 464 lb-ft. 6.6L Duramax turbo diesel V8: 470 hp / 975 lb-ft.General Motors source — PDF pages 131–133: Engine, horsepower, torque
- Transmission
- 10-speed automatic.General Motors source — PDF pages 131–133: Transmission
- Fuel type and tank
- Not transcribed for this model year.
- Drivetrain
- 2WD and 4WD; availability varies by trim. 3500 offers single or dual rear wheels; these are distinct configurations.General Motors source — PDF pages 131–133: Drivetrain
- Axle ratio
- Not transcribed for this model year.
- Tow package
- Max Trailering PackageGMC source
Bed, tongue weight, and wheelbase
The trailer rating is one limit. The bed has to fit the load, the tongue or pin has to fit in payload, and the wheelbase is the column the chart uses.
- An illustrative 10 percent of the 20,000 lb conventional maximum is 2,000 lb of tongue weight. This is not a measured load or recommended percentage; actual load may be higher.
- An illustrative 15 percent of the 22,390 lb gooseneck maximum is 3,359 lb of pin weight. This is not a measured load or recommended percentage; actual load may be higher.
- An illustrative 15 percent of the 22,390 lb fifth-wheel maximum is 3,359 lb of pin weight. This is not a measured load or recommended percentage; actual load may be higher.
Bed capacity · Tongue and pin weight · Wheelbase · GCWR, GVWR, and GAWR. The spec sheet above lists the sourced wheelbase information for this year. See the spec sheet for the sourced GCWR and its configuration.
Estimate payload margin and bed volume · How these limits work together
Change from 2024
- Conventional: 20,000 lb in 2024, 20,000 lb in 2026 (unchanged maximum, different source or equipment list).
- Gooseneck: 22,430 lb in 2024, 22,390 lb in 2026 (-40 lb).
- Fifth-wheel: 22,430 lb in 2024, 22,390 lb in 2026 (-40 lb).
Generation
T1XX HD
2026 is year 7 of this generation (2020–2026). Current Sierra 2500HD, the GMC twin of the Silverado 2500HD. Only GMC charts are stored on Sierra pages.
2026 towing by engine
Lowest to highest printed rating for each engine across 3 transcribed chart rows. A missing hitch means the chart did not print one for that engine, not that it is zero.
| Engine | Conventional | Fifth-wheel | Gooseneck | Chart rows |
|---|---|---|---|---|
| 6.6L Duramax V8 | 20,000 lb | 22,390 lb | 22,390 lb | 3 |
Highest-rated configurations
| Trailer | Engine | Cab / bed | Drive | Axle / package | GCWR | Evidence |
|---|---|---|---|---|---|---|
| 22,390 lb Gooseneck | 6.6L Duramax V8 | Regular Cab, Long | 2WD | Max Trailering Package | 30,000 lb | Page 2, 30,000 GCWR / Regular Cab 2WD, footnote 11 |
| 22,390 lb Fifth-wheel | 6.6L Duramax V8 | Regular Cab, Long | 2WD | Max Trailering Package | 30,000 lb | Page 2, 30,000 GCWR / Regular Cab 2WD, footnote 11 |
| 20,000 lb Conventional | 6.6L Duramax V8 | Crew Cab, Standard | 2WD | Max Trailering Package | 30,000 lb | Page 1, 30,000 GCWR / Crew Cab standard 2WD, footnote 5 |
Chart source: GMC, 2026 Sierra 2500 trailering charts. The evidence column gives each row’s page and table.
Find your exact configuration (3 rows) →Download 2026 rows as CSV ↓
What changes the number
- Engine and transmission
- Cab, bed, and wheelbase
- Two-wheel drive, four-wheel drive, or all-wheel drive
- Axle ratio and tow package
- Conventional hitch versus fifth-wheel versus gooseneck
- People, options, and cargo, which spend payload the chart assumed was empty
Questions
- How much can a 2026 GMC Sierra 2500HD tow?
- GMC lists a maximum of 22,390 lb on a gooseneck hitch for the 2026 GMC Sierra 2500HD in its 2026 Sierra 2500 trailering charts. That rating requires the Duramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell. Other cited maximums for the 2026 GMC Sierra 2500HD are 20,000 lb on a conventional hitch and 22,390 lb on a fifth-wheel hitch.
- Did Sierra 2500HD towing change for 2026?
- Compare the cited 2026 figures on this page with the 2024 record. They are stored separately.
- Which configuration hits the maximum?
- The 22,390 lb gooseneck maximum requires the Duramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell.
- What tongue weight should I plan for a 2026 Sierra 2500HD?
- At the cited 20,000 lb conventional maximum, an illustrative 10% assumption produces 2,000 lb of tongue weight. This is not a recommended percentage or a measurement; follow your trailer and vehicle instructions and measure the actual load. At the cited 22,390 lb gooseneck maximum, an illustrative 15% assumption produces 3,359 lb of pin weight. This is not a recommended percentage or a measurement; follow your trailer and vehicle instructions and measure the actual load. At the cited 22,390 lb fifth-wheel maximum, an illustrative 15% assumption produces 3,359 lb of pin weight. This is not a recommended percentage or a measurement; follow your trailer and vehicle instructions and measure the actual load. That load counts against payload and the rear axle rating.