Did Sierra 2500HD towing change for 2021?

Compare the cited 2021 figures on this page with the 2020 record. They are stored separately.

What tongue weight should I plan for a 2021 Sierra 2500HD?

At the cited 18,500 lb conventional maximum, an illustrative 10% assumption produces 1,850 lb of tongue 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

2021 GMC Sierra 2500HD

The cited maximum for a 2021 GMC Sierra 2500HD is 18,500 lb conventional. 6.6L Duramax L5P, 445 hp. GMC's 2021 trailering guide. The gas row is 14,500 pounds.

conventional6.6L Duramax L5P, 445 hp. GMC's 2021 trailering guide. The gas row is 14,500 pounds.18,500 lb

The build table for 2021 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	18,500 lb	6.6L Duramax L5P, 445 hp. GMC's 2021 trailering guide. The gas row is 14,500 pounds.	Secondary source

Highest figure that source lists for this model year. Another cab, axle, or package can be thousands of pounds lower.

Source: TowingSpecs, 2021 sierra-2500hd maximum. Year maximum from TowingSpecs. Rows they mark manufacturer-verified were checked against a guide or brochure; triangulated rows were cross-checked. Not a door-sticker figure.

Spec sheet

1 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: 18,500 lb. 6.6L Duramax L5P, 445 hp. GMC's 2021 trailering guide. The gas row is 14,500 pounds.TowingSpecs source
Gooseneck maximum: Not transcribed for this model year.
Fifth-wheel maximum: Not transcribed for this model year.
Tongue or pin load: 1,850 lb tongue at the 18,500 lb conventional 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: Not transcribed for this model year.
GCWR: Not transcribed for this model year.
GVWR: Not transcribed for this model year.
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: Not transcribed for this model year.
Bed length: Not transcribed for this model year.
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: Not transcribed for this model year.
Transmission: Not transcribed for this model year.
Fuel type and tank: Not transcribed for this model year.
Drivetrain: Not transcribed for this model year.
Axle ratio: Not transcribed for this model year.
Tow package: Not transcribed for this model year.

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 18,500 lb conventional maximum is 1,850 lb of tongue 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. Wheelbase is not transcribed for this year. GCWR is not transcribed for this year.

Estimate payload margin and bed volume · How these limits work together

Change from 2020

Conventional: 18,500 lb in 2020, 18,500 lb in 2021 (unchanged maximum, different source or equipment list).

Generation

T1XX HD

2021 is year 2 of this generation (2020–2026). Current Sierra 2500HD. Cited maxima are the 2025 Kelley Blue Book figures.

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 2021 GMC Sierra 2500HD tow?: The cited maximum for a 2021 GMC Sierra 2500HD is 18,500 lb conventional. 6.6L Duramax L5P, 445 hp. GMC's 2021 trailering guide. The gas row is 14,500 pounds.
Did Sierra 2500HD towing change for 2021?: Compare the cited 2021 figures on this page with the 2020 record. They are stored separately.
Which configuration hits the maximum?: 6.6L Duramax L5P, 445 hp. GMC's 2021 trailering guide. The gas row is 14,500 pounds.
What tongue weight should I plan for a 2021 Sierra 2500HD?: At the cited 18,500 lb conventional maximum, an illustrative 10% assumption produces 1,850 lb of tongue 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.

2019 · 2020 · 2022 · 2023 · All Sierra 2500HD years