Index · GMC · Sierra 3500HD
2020 GMC Sierra 3500HD
The highest gooseneck-hitch rating for the 2020 GMC Sierra 3500HD is 35,500 lb, the top of 28 rows transcribed from GMC’s 2020 GMC Trailering Guide. That row is printed for the 6.6L V8 Duramax Turbo Diesel, Regular Cab, Long bed, 2WD, DRW. Most configurations are rated lower: 27 of the 28 transcribed gooseneck-hitch chart rows for 2020 are below 35,500 lb. Other cited maximums for the 2020 GMC Sierra 3500HD are 20,000 lb on a conventional hitch and 32,000 lb on a fifth-wheel hitch. Across 84 manufacturer chart rows for 2020, ratings run conventional 14,500 lb to 20,000 lb; fifth-wheel 16,180 lb to 32,000 lb; gooseneck 16,180 lb to 35,500 lb; the engine, cab, axle ratio and package on your truck decide its number.
The build table for 2020 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 | 6.6L V8 Duramax Turbo Diesel, Crew Cab, Standard bed, 2WD, SRW. | OEM chart |
| Fifth-wheel | 32,000 lb | 6.6L V8 Duramax Turbo Diesel, Regular Cab, Long bed, 2WD, DRW. | OEM chart |
| Gooseneck | 35,500 lb | 6.6L V8 Duramax Turbo Diesel, Regular Cab, Long bed, 2WD, DRW. | OEM chart |
Highest rows among 84 transcribed chart configurations. Most trucks of this model year are rated lower; find your exact configuration in the table below.
Source: GMC, 2020 GMC Trailering Guide, Sierra HD specifications pp6-7; Sierra 1500 pp15-16; Canyon p21.
Spec sheet
7 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. 6.6L V8 Duramax Turbo Diesel, Crew Cab, Standard bed, 2WD, SRW.GMC source
- Gooseneck maximum
- 35,500 lb. 6.6L V8 Duramax Turbo Diesel, Regular Cab, Long bed, 2WD, DRW.GMC source
- Fifth-wheel maximum
- 32,000 lb. 6.6L V8 Duramax Turbo Diesel, Regular Cab, Long bed, 2WD, DRW.GMC source
- Tongue or pin load
- 2,000 lb tongue at the 20,000 lb conventional maximum. 4,800 lb pin at the 32,000 lb fifth-wheel maximum. 5,325 lb pin at the 35,500 lb gooseneck 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
- 24,000–43,500 lb across 84 chart rows that print a GCWR (each row's GCWR is in the chart table and explorer)GMC source
- 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
- Long, StandardGMC source
- 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
- 2WD, 4WDGMC source
- Axle ratio
- Not transcribed for this model year.
- Tow package
- DRW; SRWGMC 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 32,000 lb fifth-wheel maximum is 4,800 lb of pin weight. This is not a measured load or recommended percentage; actual load may be higher.
- An illustrative 15 percent of the 35,500 lb gooseneck maximum is 5,325 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. Wheelbase is not transcribed 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 2019
- Conventional: 20,000 lb in 2019, 20,000 lb in 2020 (unchanged maximum, different source or equipment list).
- Fifth-wheel: 23,100 lb in 2019, 32,000 lb in 2020 (+8,900 lb).
- Gooseneck is cited for 2020 and was not cited for 2019.
Generation
T1XX HD
2020 is year 1 of this generation (2020–2026). Current Sierra 3500HD, including dual-rear-wheel trucks. The 2025 page holds the cited conventional and gooseneck maxima.
2020 towing by engine
Lowest to highest printed rating for each engine across 84 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 V8 Duramax Turbo Diesel | 14,500–20,000 lb | 21,040–32,000 lb | 21,040–35,500 lb | 42 |
| 6.6L V8 gas | 14,500–16,800 lb | 16,180–17,200 lb | 16,180–17,200 lb | 42 |
Highest-rated configurations
| Trailer | Engine | Cab / bed | Drive | Axle / package | GCWR | Evidence |
|---|---|---|---|---|---|---|
| 35,500 lb Gooseneck | 6.6L V8 Duramax Turbo Diesel | Regular Cab, Long | 2WD | DRW | 43,500 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Reg 2WD Long / 6.6L V8 Duramax Turbo Diesel |
| 32,000 lb Fifth-wheel | 6.6L V8 Duramax Turbo Diesel | Regular Cab, Long | 2WD | DRW | 43,500 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Reg 2WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,760 lb Fifth-wheel | 6.6L V8 Duramax Turbo Diesel | Regular Cab, Long | 4WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Reg 4WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,760 lb Gooseneck | 6.6L V8 Duramax Turbo Diesel | Regular Cab, Long | 4WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Reg 4WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,500 lb Fifth-wheel | 6.6L V8 Duramax Turbo Diesel | Double Cab, Long | 2WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Double 2WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,500 lb Gooseneck | 6.6L V8 Duramax Turbo Diesel | Double Cab, Long | 2WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Double 2WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,400 lb Fifth-wheel | 6.6L V8 Duramax Turbo Diesel | Crew Cab, Long | 2WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Crew 2WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,400 lb Gooseneck | 6.6L V8 Duramax Turbo Diesel | Crew Cab, Long | 2WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Crew 2WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,340 lb Fifth-wheel | 6.6L V8 Duramax Turbo Diesel | Double Cab, Long | 4WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Double 4WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,340 lb Gooseneck | 6.6L V8 Duramax Turbo Diesel | Double Cab, Long | 4WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Double 4WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,180 lb Fifth-wheel | 6.6L V8 Duramax Turbo Diesel | Crew Cab, Long | 4WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Crew 4WD Long / 6.6L V8 Duramax Turbo Diesel |
| 31,180 lb Gooseneck | 6.6L V8 Duramax Turbo Diesel | Crew Cab, Long | 4WD | DRW | 40,000 lb | Page 6, Sierra HD Duramax turbo diesel specifications, row 3500 DRW Crew 4WD Long / 6.6L V8 Duramax Turbo Diesel |
Chart source: GMC, 2020 GMC Trailering Guide. The evidence column gives each row’s page and table.
Find your exact configuration (84 rows) →Download 2020 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 2020 GMC Sierra 3500HD tow?
- The highest gooseneck-hitch rating for the 2020 GMC Sierra 3500HD is 35,500 lb, the top of 28 rows transcribed from GMC’s 2020 GMC Trailering Guide. That row is printed for the 6.6L V8 Duramax Turbo Diesel, Regular Cab, Long bed, 2WD, DRW. Most configurations are rated lower: 27 of the 28 transcribed gooseneck-hitch chart rows for 2020 are below 35,500 lb. Other cited maximums for the 2020 GMC Sierra 3500HD are 20,000 lb on a conventional hitch and 32,000 lb on a fifth-wheel hitch.
- Did Sierra 3500HD towing change for 2020?
- Compare the cited 2020 figures on this page with the 2019 record. They are stored separately.
- Which configuration hits the maximum?
- The 35,500 lb gooseneck maximum is printed for the 6.6L V8 Duramax Turbo Diesel, Regular Cab, Long bed, 2WD, DRW.
- What tongue weight should I plan for a 2020 Sierra 3500HD?
- 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 32,000 lb fifth-wheel maximum, an illustrative 15% assumption produces 4,800 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 35,500 lb gooseneck maximum, an illustrative 15% assumption produces 5,325 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.
Compare with
2018 · 2019 · 2021 · 2022 · All Sierra 3500HD years