Did Sierra 2500HD towing change for 2026?

Compare the cited 2026 figures on this page with the 2025 record. They are stored separately.

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.

Index · GMC · Sierra 2500HD

2026 GMC Sierra 2500HD

The cited maximum for a 2026 GMC Sierra 2500HD is 20,000 lb conventional, 22,390 lb gooseneck, 22,390 lb fifth-wheel. 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.

conventionalDuramax 6.6L, Crew Cab standard bed 2WD, 30,000 lb GCWR and Max Trailering Package; other qualifying Crew Cab cells also reach this maximum.20,000 lb

gooseneckDuramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell.22,390 lb

fifth-wheelDuramax 6.6L, Regular Cab long bed 2WD, 30,000 lb GCWR and Max Trailering Package. Page 2 publishes a combined fifth-wheel/gooseneck cell.22,390 lb

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. 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 2025

Conventional: 20,000 lb in 2025, 20,000 lb in 2026 (unchanged maximum, different source or equipment list).
Gooseneck: 22,430 lb in 2025, 22,390 lb in 2026 (-40 lb).
Fifth-wheel is cited for 2026 and was not cited for 2025.

Generation

T1XX HD

2026 is year 7 of this generation (2020–2026). Current Sierra 2500HD. Cited maxima are the 2025 Kelley Blue Book figures.

Configuration chart

These are transcribed cells, not the entire factory chart. A missing row is missing, not a zero.

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	GMC 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	GMC 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	GMC Page 1, 30,000 GCWR / Crew Cab standard 2WD, footnote 5

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?: The cited maximum for a 2026 GMC Sierra 2500HD is 20,000 lb conventional, 22,390 lb gooseneck, 22,390 lb fifth-wheel. 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.
Did Sierra 2500HD towing change for 2026?: Compare the cited 2026 figures on this page with the 2025 record. They are stored separately.
Which configuration hits the maximum?: 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.

2024 · 2025 · All Sierra 2500HD years