The GMC Sierra 2500 is a heavy-duty, three-quarter-ton pickup truck produced by General Motors under the GMC brand. The Sierra 2500HD designation has been in continuous production since the 2001 model year, spanning multiple platform generations through the current 2026 model year. The truck is offered in Regular Cab, Double Cab, and Crew Cab body styles with standard and long bed configurations.
This guide covers GMC Sierra 2500 towing capacity by model year and drivetrain configuration, including maximum trailer weight, payload limits, GCWR, tongue weight limits, and hitch class requirements. Towing capacity changes significantly depending on engine selection, drivetrain type, cab configuration, bed length, axle ratio, and optional tow packages.
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2026 GMC Sierra 2500 Towing Capacity
The 2026 GMC Sierra 2500HD continues on the refreshed T1 platform introduced with the 2024 model year update. Engine options, transmission pairings, and towing ratings carry forward from the 2025 model year with no major structural revisions.
| Specification | Detail |
|---|---|
| Engine Options | 6.6L V8 L8T Gasoline (401 hp / 464 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (470 hp / 975 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 20,000 lbs / 9,072 kg (diesel, NHT package, Crew Cab) |
| Conventional Towing Capacity (Ball Hitch) | Up to 20,000 lbs / 9,072 kg (diesel + NHT); Up to 16,000 lbs / 7,258 kg (gas, Crew Cab) |
| Fifth-Wheel / Gooseneck Capacity | Up to 22,390 lbs / 10,156 kg (diesel, NHT, Regular Cab Long Bed 2WD) |
| Maximum Payload Capacity | Up to 3,979 lbs / 1,805 kg |
| Gross Combined Weight Rating (GCWR) | Up to 29,000 lbs / 13,154 kg (varies by configuration) |
| Tongue Weight Limit | Up to 2,000 lbs / 907 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional (NHT Max Trailering Package available) |
The 2026 GMC Sierra 2500 reaches a maximum towing capacity of 20,000 lbs when equipped with the Duramax diesel engine and the NHT Max Trailering Package. The Allison-branded 10-speed automatic transmission is standard on both engine options in this model year.
2025 GMC Sierra 2500 Towing Capacity
The 2025 GMC Sierra 2500HD is built on the refreshed T1 platform and received minor updates from the prior model year. Both engine options were updated as part of the mid-cycle refresh carried over from 2024.
| Specification | Detail |
|---|---|
| Engine Options | 6.6L V8 L8T Gasoline (401 hp / 464 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (470 hp / 975 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 20,000 lbs / 9,072 kg (diesel + NHT, Crew Cab) |
| Conventional Towing Capacity (Ball Hitch) | Up to 20,000 lbs / 9,072 kg (diesel + NHT); Up to 16,000 lbs / 7,258 kg (gas, Crew Cab) |
| Fifth-Wheel / Gooseneck Capacity | Up to 22,390 lbs / 10,156 kg (diesel, NHT, Regular Cab Long Bed 2WD) |
| Maximum Payload Capacity | Up to 3,979 lbs / 1,805 kg |
| Gross Combined Weight Rating (GCWR) | Up to 29,000 lbs / 13,154 kg (varies by configuration) |
| Tongue Weight Limit | Up to 2,000 lbs / 907 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional (NHT Max Trailering Package) |
The 2025 GMC Sierra 2500 offers a maximum conventional towing capacity of 20,000 lbs with the diesel engine and NHT package on select Crew Cab configurations. The lowest-rated 2025 Sierra 2500 configurations, including the Regular Cab and Double Cab Standard Bed, carry a 14,500 lb / 6,577 kg maximum trailer weight.
2024 GMC Sierra 2500 Towing Capacity
The 2024 GMC Sierra 2500HD introduced a mid-cycle refresh with updated exterior and interior design and revised powertrain output ratings. The diesel engine received a significant power increase to 470 hp and 975 lb-ft of torque.
| Specification | Detail |
|---|---|
| Engine Options | 6.6L V8 L8T Gasoline (401 hp / 464 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (470 hp / 975 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 20,000 lbs / 9,072 kg (diesel + NHT, Crew Cab) |
| Conventional Towing Capacity (Ball Hitch) | Up to 20,000 lbs / 9,072 kg (diesel + NHT); Up to 16,000 lbs / 7,258 kg (gas, Crew Cab) |
| Fifth-Wheel / Gooseneck Capacity | Up to 22,430 lbs / 10,174 kg (diesel, NHT, Regular Cab Long Bed 2WD) |
| Maximum Payload Capacity | Up to 3,979 lbs / 1,805 kg |
| Gross Combined Weight Rating (GCWR) | Up to 29,000 lbs / 13,154 kg (varies by configuration) |
| Tongue Weight Limit | Up to 2,000 lbs / 907 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional (NHT Max Trailering Package) |
The 2024 GMC Sierra 2500 marks the introduction of the Allison-branded 10-speed automatic transmission for gasoline-engine models, replacing the prior GM six-speed unit. Diesel-equipped 2500HD Crew Cab models with the NHT package reach 20,000 lbs / 9,072 kg maximum conventional towing, a notable increase over the pre-refresh generation.
2023 GMC Sierra 2500 Towing Capacity
The 2023 GMC Sierra 2500HD is the final model year before the mid-cycle refresh. Engine output and towing ratings remain unchanged from the 2022 model year. The gasoline engine pairs with the GM six-speed automatic, and the diesel uses the Allison 10-speed.
| Specification | Detail |
|---|---|
| Engine Options | 6.6L V8 L8T Gasoline (401 hp / 464 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (445 hp / 910 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 18,500 lbs / 8,392 kg (diesel, Crew Cab) |
| Conventional Towing Capacity (Ball Hitch) | Up to 18,500 lbs / 8,392 kg (diesel, Crew Cab); Up to 16,000 lbs / 7,258 kg (gas, Crew Cab) |
| Fifth-Wheel / Gooseneck Capacity | Up to 21,500 lbs / 9,752 kg (select configurations) |
| Maximum Payload Capacity | Up to 3,979 lbs / 1,805 kg |
| Gross Combined Weight Rating (GCWR) | Up to 25,000 lbs / 11,340 kg (varies by configuration) |
| Tongue Weight Limit | Up to 1,850 lbs / 839 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2023 GMC Sierra 2500 carries a maximum conventional trailer weight of 18,500 lbs with the Duramax diesel on Crew Cab configurations. The gasoline-powered 6.6L V8 L8T engine supports up to 16,000 lbs in Crew Cab Long and Standard Bed models.
2022 GMC Sierra 2500 Towing Capacity
The 2022 GMC Sierra 2500HD continues on the T1 platform with the same two engine configurations as the prior two model years. Towing ratings carry forward from 2020-2021 with no major revision.
| Specification | Detail |
|---|---|
| Engine Options | 6.6L V8 L8T Gasoline (401 hp / 464 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (445 hp / 910 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 18,500 lbs / 8,392 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 18,500 lbs / 8,392 kg (diesel, Crew Cab); Up to 16,000 lbs / 7,258 kg (gas, Crew Cab) |
| Fifth-Wheel / Gooseneck Capacity | Up to 21,500 lbs / 9,752 kg (diesel, select configurations) |
| Maximum Payload Capacity | Up to 3,760 lbs / 1,705 kg |
| Gross Combined Weight Rating (GCWR) | Up to 25,000 lbs / 11,340 kg |
| Tongue Weight Limit | Up to 1,850 lbs / 839 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2022 GMC Sierra 2500 reaches a maximum conventional trailer weight of 18,500 lbs / 8,392 kg with the diesel engine on properly configured Crew Cab models. The gasoline L8T engine supports up to 16,000 lbs in Crew Cab configurations and 14,500 lbs in Regular Cab and Double Cab Standard Bed models.
2021 GMC Sierra 2500 Towing Capacity
The 2021 GMC Sierra 2500HD is a continuation of the 2020 T1 platform launch with no major powertrain or towing capacity changes. Both engine options and towing ratings remain consistent with the 2020 introduction.
| Specification | Detail |
|---|---|
| Engine Options | 6.6L V8 L8T Gasoline (401 hp / 464 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (445 hp / 910 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 18,500 lbs / 8,392 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 18,500 lbs / 8,392 kg (diesel, Crew Cab); Up to 16,000 lbs / 7,258 kg (gas, Crew Cab) |
| Fifth-Wheel / Gooseneck Capacity | Up to 21,500 lbs / 9,752 kg (diesel, select configurations) |
| Maximum Payload Capacity | Up to 3,979 lbs / 1,805 kg |
| Gross Combined Weight Rating (GCWR) | Up to 25,000 lbs / 11,340 kg |
| Tongue Weight Limit | Up to 1,850 lbs / 839 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2021 GMC Sierra 2500 uses the same 6.6L V8 L8T gasoline engine and 6.6L L5P Duramax diesel introduced in 2020. Maximum conventional towing is 18,500 lbs with the diesel in Crew Cab configurations when the factory tow package is installed.
2020 GMC Sierra 2500 Towing Capacity
The 2020 GMC Sierra 2500HD transitioned to the new T1 platform and introduced a completely redesigned 6.6L V8 gasoline engine replacing the prior 6.0L Vortec unit. The new gas engine increased horsepower by 11 percent and torque by 22 percent over the outgoing unit.
| Specification | Detail |
|---|---|
| Engine Options | 6.6L V8 L8T Gasoline (401 hp / 464 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (445 hp / 910 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 18,500 lbs / 8,392 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 18,500 lbs / 8,392 kg (diesel); Up to 14,500 lbs / 6,577 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | Up to 21,500 lbs / 9,752 kg (select diesel configurations) |
| Maximum Payload Capacity | Up to 3,979 lbs / 1,805 kg |
| Gross Combined Weight Rating (GCWR) | Up to 25,000 lbs / 11,340 kg |
| Tongue Weight Limit | Up to 1,850 lbs / 839 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2020 GMC Sierra 2500 introduced the T1 chassis and replaced the 6.0L Vortec with the purpose-built 6.6L L8T gasoline V8. The Duramax diesel produces 445 hp and 910 lb-ft of torque and supports a maximum conventional trailer weight of 18,500 lbs on properly equipped configurations.
2019 GMC Sierra 2500 Towing Capacity
The 2019 GMC Sierra 2500HD is the final model year on the K2XX platform. It retains the 6.6L Duramax L5P diesel introduced in 2017 and the 6.0L Vortec gasoline V8. Towing ratings are consistent with the 2017-2018 model years.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (445 hp / 910 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 18,100 lbs / 8,210 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 18,100 lbs / 8,210 kg (diesel); Up to 13,000 lbs / 5,897 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | Up to 18,100 lbs / 8,210 kg (select configurations) |
| Maximum Payload Capacity | Up to 3,095 lbs / 1,404 kg |
| Gross Combined Weight Rating (GCWR) | Up to 22,900 lbs / 10,387 kg |
| Tongue Weight Limit | Up to 1,810 lbs / 821 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2019 GMC Sierra 2500 with the L5P Duramax diesel and factory tow package reaches a maximum conventional trailer weight of 18,100 lbs. Gas-equipped models are rated to a maximum of 13,000 lbs under standard towing configurations.
2018 GMC Sierra 2500 Towing Capacity
The 2018 GMC Sierra 2500HD is a continuation of the K2XX generation with the 6.6L L5P Duramax diesel and 6.0L Vortec gasoline V8. No significant changes to towing capacity were made from the 2017 model year.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (445 hp / 910 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 18,100 lbs / 8,210 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 18,100 lbs / 8,210 kg (diesel); Up to 13,000 lbs / 5,897 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | Up to 18,100 lbs / 8,210 kg (select configurations) |
| Maximum Payload Capacity | Up to 3,095 lbs / 1,404 kg |
| Gross Combined Weight Rating (GCWR) | Up to 22,900 lbs / 10,387 kg |
| Tongue Weight Limit | Up to 1,810 lbs / 821 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2018 GMC Sierra 2500 uses the second-generation L5P Duramax diesel engine paired with an Allison 10-speed automatic transmission. Maximum conventional towing is 18,100 lbs with the diesel engine when properly equipped with the factory tow package.
2017 GMC Sierra 2500 Towing Capacity
The 2017 GMC Sierra 2500HD introduced the all-new 6.6L Duramax L5P turbodiesel engine, replacing the LML unit used since 2011. The new diesel produced 445 hp and 910 lb-ft of torque and increased maximum towing capacity over prior model years.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 L5P Duramax Turbo-Diesel (445 hp / 910 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 18,100 lbs / 8,210 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 18,100 lbs / 8,210 kg (diesel); Up to 13,000 lbs / 5,897 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | Up to 18,100 lbs / 8,210 kg (select configurations) |
| Maximum Payload Capacity | Up to 2,943 lbs / 1,335 kg |
| Gross Combined Weight Rating (GCWR) | Up to 22,900 lbs / 10,387 kg |
| Tongue Weight Limit | Up to 1,810 lbs / 821 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2017 GMC Sierra 2500 marked a major diesel engine transition from the LML to the L5P Duramax unit, increasing torque by 145 lb-ft. Diesel-equipped models with the factory tow package reach a maximum conventional trailer weight of 18,100 lbs.
2016 GMC Sierra 2500 Towing Capacity
The 2016 GMC Sierra 2500HD continues on the K2XX platform with the 6.6L Duramax LML diesel engine and 6.0L Vortec gasoline V8. The LML is the last model year before the L5P replacement arrives in 2017.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 LML Duramax Turbo-Diesel (397 hp / 765 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 17,900 lbs / 8,119 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 17,900 lbs / 8,119 kg (diesel); Up to 13,000 lbs / 5,897 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | Up to 17,900 lbs / 8,119 kg (select configurations) |
| Maximum Payload Capacity | Up to 3,200 lbs / 1,451 kg |
| Gross Combined Weight Rating (GCWR) | Up to 22,500 lbs / 10,206 kg |
| Tongue Weight Limit | Up to 1,790 lbs / 812 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2016 GMC Sierra 2500 is equipped with the 6.6L LML Duramax diesel producing 397 hp and 765 lb-ft of torque with an Allison 6-speed automatic transmission. Maximum conventional towing reaches 17,900 lbs on properly equipped diesel-engine models.
2015 GMC Sierra 2500 Towing Capacity
The 2015 GMC Sierra 2500HD is the first year on the K2XX platform, which brought a significant increase in maximum towing capacity over the prior GMT900 generation. The Duramax LML diesel engine carries over from the prior generation with the same power output.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 LML Duramax Turbo-Diesel (397 hp / 765 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 17,900 lbs / 8,119 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 17,900 lbs / 8,119 kg (diesel); Up to 13,000 lbs / 5,897 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | Up to 17,900 lbs / 8,119 kg (select configurations) |
| Maximum Payload Capacity | Up to 3,200 lbs / 1,451 kg |
| Gross Combined Weight Rating (GCWR) | Up to 22,500 lbs / 10,206 kg |
| Tongue Weight Limit | Up to 1,790 lbs / 812 kg |
| Hitch Class | Class IV / V (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2015 GMC Sierra 2500 debuted on the K2XX platform and raised the maximum conventional towing capacity to 17,900 lbs with the diesel engine, a major improvement over the prior GMT900 generation’s 13,000 lb rating. Gasoline-engine models are rated at a maximum of 13,000 lbs conventional.
2014 GMC Sierra 2500 Towing Capacity
The 2014 GMC Sierra 2500HD is the final model year on the GMT900 platform. The 6.6L LML Duramax diesel and 6.0L Vortec gasoline V8 remain the powertrain options. Towing capacity is consistent with the 2011-2013 model years.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 LML Duramax Turbo-Diesel (397 hp / 765 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 14,500 lbs / 6,577 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 14,500 lbs / 6,577 kg (diesel); Up to 13,000 lbs / 5,897 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,400 lbs / 1,542 kg |
| Gross Combined Weight Rating (GCWR) | Up to 19,500 lbs / 8,845 kg |
| Tongue Weight Limit | Up to 1,450 lbs / 658 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2014 GMC Sierra 2500 closes out the GMT900 platform with maximum conventional towing of 14,500 lbs for diesel models. The Allison 6-speed automatic transmission pairs with the LML diesel throughout the 2011-2014 model years.
2013 GMC Sierra 2500 Towing Capacity
The 2013 GMC Sierra 2500HD continues with the LML Duramax diesel and 6.0L Vortec gasoline V8. No significant changes to towing capacity were made from the 2012 model year.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 LML Duramax Turbo-Diesel (397 hp / 765 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 14,500 lbs / 6,577 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 14,500 lbs / 6,577 kg (diesel); Up to 13,000 lbs / 5,897 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,400 lbs / 1,542 kg |
| Gross Combined Weight Rating (GCWR) | Up to 19,500 lbs / 8,845 kg |
| Tongue Weight Limit | Up to 1,450 lbs / 658 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2013 GMC Sierra 2500 carries a maximum conventional towing capacity of 14,500 lbs with the 6.6L LML Duramax diesel. The 6.0L gasoline V8 is rated for up to 13,000 lbs maximum trailer weight.
2012 GMC Sierra 2500 Towing Capacity
The 2012 GMC Sierra 2500HD maintains the GMT900 platform. The LML diesel was introduced for this platform in 2011. Towing capacity figures remain consistent with the 2011 model year.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 LML Duramax Turbo-Diesel (397 hp / 765 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 13,000 lbs / 5,897 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 13,000 lbs / 5,897 kg |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,400 lbs / 1,542 kg |
| Gross Combined Weight Rating (GCWR) | Up to 18,000 lbs / 8,165 kg |
| Tongue Weight Limit | Up to 1,300 lbs / 590 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2012 GMC Sierra 2500 is rated for a maximum conventional trailer weight of 13,000 lbs. Actual capacity varies by drivetrain type, axle ratio, and equipment level.
2011 GMC Sierra 2500 Towing Capacity
The 2011 GMC Sierra 2500HD introduced the new 6.6L LML Duramax diesel engine to the GMT900 platform, replacing the LMM unit from the prior generation. The LML increased peak power output and torque over the prior engine.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (360 hp / 380 lb-ft); 6.6L V8 LML Duramax Turbo-Diesel (397 hp / 765 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 13,000 lbs / 5,897 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 13,000 lbs / 5,897 kg |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,400 lbs / 1,542 kg |
| Gross Combined Weight Rating (GCWR) | Up to 18,000 lbs / 8,165 kg |
| Tongue Weight Limit | Up to 1,300 lbs / 590 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2011 GMC Sierra 2500 introduced the LML Duramax diesel with improved power figures, but towing capacity remained at 13,000 lbs for the 2500HD within the GMT900 chassis limits. The LML diesel pairs with the Allison 6-speed automatic transmission.
2010 GMC Sierra 2500 Towing Capacity
The 2010 GMC Sierra 2500HD is the final model year equipped with the 6.6L Duramax LMM diesel. The gasoline option remains the 6.0L Vortec V8. Platform and towing limits are unchanged from 2007-2009.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (353 hp / 373 lb-ft); 6.6L V8 LMM Duramax Turbo-Diesel (365 hp / 660 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 13,000 lbs / 5,897 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 13,000 lbs / 5,897 kg |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,500 lbs / 1,588 kg |
| Gross Combined Weight Rating (GCWR) | Up to 17,500 lbs / 7,938 kg |
| Tongue Weight Limit | Up to 1,300 lbs / 590 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2010 GMC Sierra 2500 is the last year of the LMM Duramax diesel, rated at 365 hp and 660 lb-ft of torque. Maximum conventional towing remains at 13,000 lbs across both engine configurations.
2009 GMC Sierra 2500 Towing Capacity
The 2009 GMC Sierra 2500HD continues on the GMT900 platform. The 6.6L LMM Duramax diesel and 6.0L Vortec gasoline V8 remain the only engine options. No significant towing capacity changes were made from 2008.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (353 hp / 373 lb-ft); 6.6L V8 LMM Duramax Turbo-Diesel (365 hp / 660 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 13,000 lbs / 5,897 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 13,000 lbs / 5,897 kg |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,480 lbs / 1,579 kg |
| Gross Combined Weight Rating (GCWR) | Up to 17,500 lbs / 7,938 kg |
| Tongue Weight Limit | Up to 1,300 lbs / 590 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2009 GMC Sierra 2500 is rated for a maximum conventional trailer weight of 13,000 lbs across all engine and drivetrain configurations. Payload capacity is up to 3,480 lbs / 1,579 kg depending on cab and bed selection.
2008 GMC Sierra 2500 Towing Capacity
The 2008 GMC Sierra 2500HD uses the GMT900 platform introduced for the 2007 model year. The 6.6L LMM Duramax diesel and 6.0L Vortec V8 gasoline engine are the available powerplants.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (353 hp / 373 lb-ft); 6.6L V8 LMM Duramax Turbo-Diesel (365 hp / 660 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 13,000 lbs / 5,897 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 13,000 lbs / 5,897 kg |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,646 lbs / 1,654 kg |
| Gross Combined Weight Rating (GCWR) | Up to 17,500 lbs / 7,938 kg |
| Tongue Weight Limit | Up to 1,300 lbs / 590 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2008 GMC Sierra 2500 posts a maximum conventional towing capacity of 13,000 lbs with a maximum payload of 3,646 lbs. Both the diesel and gasoline configurations share the same 13,000 lb towing limit on the GMT900 chassis at this rating point.
2007 GMC Sierra 2500 Towing Capacity
The 2007 GMC Sierra 2500HD is the first model year on the all-new GMT900 platform. The 6.6L Duramax LMM diesel replaced the prior LLY and LBZ engines.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (353 hp / 373 lb-ft); 6.6L V8 LMM Duramax Turbo-Diesel (365 hp / 660 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 13,000 lbs / 5,897 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 13,000 lbs / 5,897 kg |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,600 lbs / 1,633 kg |
| Gross Combined Weight Rating (GCWR) | Up to 17,500 lbs / 7,938 kg |
| Tongue Weight Limit | Up to 1,300 lbs / 590 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2007 GMC Sierra 2500 introduced the GMT900 platform with the new LMM Duramax diesel engine paired with an Allison 6-speed automatic transmission. Maximum conventional towing is rated at 13,000 lbs under the GMT900 platform capacity limits.
2006 GMC Sierra 2500 Towing Capacity
The 2006 GMC Sierra 2500HD is the final model year on the GMT800 platform. The 6.6L Duramax LBZ diesel replaced the LLY unit mid-cycle in 2006 and brought a significant increase in power output.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (300 hp / 360 lb-ft); 6.6L V8 LBZ Duramax Turbo-Diesel (360 hp / 650 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 13,000 lbs / 5,897 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 13,000 lbs / 5,897 kg (diesel); Up to 9,500 lbs / 4,309 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,400 lbs / 1,542 kg |
| Gross Combined Weight Rating (GCWR) | Up to 17,000 lbs / 7,711 kg |
| Tongue Weight Limit | Up to 1,300 lbs / 590 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2006 GMC Sierra 2500 uses the 6.6L LBZ Duramax diesel with an Allison 6-speed automatic, rated at 360 hp and 650 lb-ft of torque. Maximum conventional towing with the diesel is 13,000 lbs on the GMT800 chassis.
2005 GMC Sierra 2500 Towing Capacity
The 2005 GMC Sierra 2500HD operates on the GMT800 platform. The 6.6L Duramax LLY diesel is the high-capacity engine option. The LLY produces 310 hp and 520 lb-ft of torque with the Allison 5-speed automatic.
| Specification | Detail |
|---|---|
| Engine Options | 6.0L V8 Vortec Gasoline (300 hp / 360 lb-ft); 6.6L V8 LLY Duramax Turbo-Diesel (310 hp / 520 lb-ft) |
| Drivetrain | 2WD / 4WD |
| Maximum Towing Capacity | Up to 12,500 lbs / 5,670 kg |
| Conventional Towing Capacity (Ball Hitch) | Up to 12,500 lbs / 5,670 kg (diesel); Up to 9,500 lbs / 4,309 kg (gas) |
| Fifth-Wheel / Gooseneck Capacity | N/A for 2500HD at this generation |
| Maximum Payload Capacity | Up to 3,200 lbs / 1,452 kg |
| Gross Combined Weight Rating (GCWR) | Up to 16,500 lbs / 7,484 kg |
| Tongue Weight Limit | Up to 1,250 lbs / 567 kg |
| Hitch Class | Class IV (2-inch square receiver) |
| Factory Tow Package | Optional |
The 2005 GMC Sierra 2500 with the LLY Duramax diesel and Allison 5-speed automatic is rated for a maximum conventional trailer weight of 12,500 lbs. The gasoline 6.0L Vortec V8 is limited to approximately 9,500 lbs maximum trailer weight in this model year.
Towing Equipment and Setup
Correct towing equipment reduces risk and keeps trailer loads within safe operating limits for the Sierra 2500. The following components apply regardless of model year.
Factory Tow Package
The factory tow package on the Sierra 2500 typically includes a heavy-duty trailer hitch receiver, upgraded trailer wiring harness, trailer brake controller pre-wiring, and transmission and engine oil coolers. Models without the tow package carry lower towing limits. The NHT Max Trailering Package on 2024-2026 models adds equipment that unlocks the 20,000 lb conventional towing rating on diesel models.
Trailer Brake Controller
Federal regulations and GMC guidelines require an independent trailer brake controller for trailers over 10,000 lbs gross trailer weight. A properly calibrated brake controller proportionally applies trailer brakes during deceleration, reducing stopping distance and trailer sway risk. In-cab integrated trailer brake controllers have been available on Sierra 2500 models across multiple generations.
Weight-Distributing Hitch
A weight-distributing hitch is recommended for trailers above 10,000 lbs when using a conventional ball hitch. It distributes tongue weight across both the tow vehicle and trailer axles, reducing front axle lift and improving steering response. This type of hitch is often paired with sway control bars to further improve stability.
Normal vs. Heavy Towing Setup Comparison
| Equipment | Standard Towing (Under 10,000 lbs) | Heavy Towing (Over 10,000 lbs) |
|---|---|---|
| Hitch Type | Standard ball mount | Weight-distributing hitch |
| Trailer Brakes | Not required (varies by state) | Required |
| Brake Controller | Optional | Required |
| Sway Control | Optional | Recommended |
| Transmission Temp Monitor | Optional | Required |
| Extended Towing Mirrors | Recommended | Required |
| Tire Load Rating | Standard LT rating | Match or exceed GVWR |
Frequently Asked Questions
What is the maximum towing capacity of a GMC Sierra 2500?
The maximum towing capacity of a GMC Sierra 2500 is 20,000 lbs / 9,072 kg, available on 2024-2026 diesel-equipped Crew Cab models with the NHT Max Trailering Package. This applies to conventional ball hitch towing. Fifth-wheel and gooseneck configurations can reach 22,430 lbs on specific Regular Cab configurations.
How much can a GMC Sierra 2500 tow with a tow package?
With the factory tow package installed, the GMC Sierra 2500 reaches its published maximum towing capacity for the given engine and configuration. Without the tow package, capacity is reduced and critical cooling and braking equipment may not be present. The NHT Max Trailering Package on 2024+ models provides the highest available rating of 20,000 lbs with the diesel engine.
Does 4WD affect GMC Sierra 2500 towing capacity?
Four-wheel-drive models of the Sierra 2500 typically carry slightly lower maximum towing ratings than equivalent 2WD models due to added drivetrain weight. For example, the 2025 Sierra 2500HD Regular Cab Long Bed 2WD diesel with NHT reaches 22,390 lbs fifth-wheel capacity, while the 4WD equivalent is rated at 22,000 lbs. Drivetrain type affects capacity calculations across all model years.
What trailer weight is safe for a GMC Sierra 2500?
A safe trailer weight stays within the manufacturer’s published maximum trailer weight rating for the specific configuration and never exceeds the GCWR when combined with vehicle curb weight, passengers, and cargo. Tongue weight must also remain within the rated limit, typically 10-15 percent of the trailer gross weight. Exceeding any of these limits compromises braking performance and drivetrain reliability.
Do I need a weight-distributing hitch for a GMC Sierra 2500?
A weight-distributing hitch is recommended when conventional trailer tongue weight exceeds 10 percent of the Sierra 2500’s front axle weight rating. For trailers above 10,000 lbs, a weight-distributing hitch helps maintain level vehicle attitude and improves steering. Trailers under 6,000 lbs can typically use a standard ball mount without weight distribution.
Which engine gives the GMC Sierra 2500 the highest towing capacity?
The 6.6L Duramax turbodiesel engine provides the highest towing capacity in every Sierra 2500 model year. In 2024-2026 models, the diesel is rated at 470 hp and 975 lb-ft of torque and supports up to 20,000 lbs conventional towing with the NHT package. The gasoline 6.6L V8 L8T is rated for a maximum of 16,000 lbs on the same Crew Cab configurations.
Conclusion
The GMC Sierra 2500 towing capacity ranges from approximately 9,500 lbs on older gasoline-equipped GMT800 models to 20,000 lbs on current diesel-equipped 2024-2026 models with the NHT Max Trailering Package. Towing capacity increased substantially at two key generation transitions: the 2015 K2XX launch raised diesel towing from 13,000-14,500 lbs to approximately 17,900 lbs, and the 2020 T1 generation increased maximum ratings to 18,500 lbs, with the 2024 refresh pushing that figure to 20,000 lbs.
Engine selection is the single largest factor in determining towing limits. Diesel-equipped Sierra 2500 models consistently outperform gasoline configurations across all model years. The factory tow package, axle ratio, cab configuration, and bed length all affect the published trailer weight limits within each engine option.
