The 2025 GMC Sierra 2500 HD represents the sixth model year of the fourth-generation full-size heavy-duty pickup, for which it receives minor changes.
These changes follow the 2020 Sierra 2500 HD, which received a complete overhaul (re-engineering and redesign) and launched the fourth-gen model, followed by a mid-cycle refresh for the 2024 Sierra 2500 HD.
Quick Facts
| Assembly Location | GM Flint Assembly, Michigan, USA |
| Type | Full-size heavy-duty pickup truck (three quarter ton), single rear wheel |
| Cabs | Regular Cab, Double Cab, Crew Cab |
| Beds | Standard Bed, Long Bed |
| Layout | Front-Engined, Longitudinal |
| Engines | Atmospheric 6.6L L8T V8 (Gasoline), Turbo 6.6 L5P V8 Duramax (Diesel) |
| Transmissions | 10-Speed Auto, 10-Speed Auto Allison |
| Drive Wheels | Rear-Wheel-Drive, Four-Wheel-Drive |
| Availability | U.S.A., Canada, Mexico, Middle East |
| Chronology | Sixth year of fourth-generation model |
| Changes summary | Minor |
| Predecessor | 2024 GMC Sierra 2500 HD |
| Successor | 2026 GMC Sierra 2500 HD |
Model Line
The 2025 GMC Sierra 2500 HD continues to be offered as a full-size, heavy duty, three quarter ton pickup across the following trim levels and configurations:
Trim Levels
- Pro (1SA)
- SLE (3SA)
- SLT (4SA)
- AT4 (4SB)
- AT4X (4SG)
- Denali (5SA)
- Denali Ultimate (5SB)
Configurations
- 2WD Standard Bed Crew Cab (TC20743)
- 4WD Standard Bed Crew Cab (TK20743)
- 2WD Long Bed Crew Cab (TC20943)
- 4WD Long Bed Crew Cab (TK20943)
- 2WD Standard Bed Double Cab (TC20753)
- 4WD Standard Bed Double Cab (TK20753)
- 2WD Long Bed Double Cab (TC20953)
- 4WD Long Bed Double Cab (TK20953)
- 2WD Long Bed Regular Cab (TC20903)
- 4WD Long Bed Regular Cab (TK20903)
Build Combinations
These trim levels and configurations can result in the following build combinations.
| Cab | Bed | Drive Wheels | Pro | SLE | SLT | AT4 | AT4X | Denali | Denali Ultimate |
|---|---|---|---|---|---|---|---|---|---|
| Crew | Standard | 2WD | A | - | - | - | - | - | - |
| Crew | Standard | 4WD | A | A | A | A | A | A | A |
| Crew | Long | 2WD | A | - | - | - | - | - | - |
| Crew | Long | 4WD | A | A | A | A | - | - | - |
| Double | Standard | 2WD | A | - | - | - | - | - | - |
| Double | Standard | 4WD | A | A | - | - | - | - | - |
| Double | Long | 2WD | A | - | - | - | - | - | - |
| Double | Long | 4WD | A | A | - | - | - | - | - |
| Regular | Long | 2WD | A | - | - | - | - | - | - |
| Regular | Long | 4WD | A | A | - | - | - | - | - |
A: available
-: not available
Changes, Updates, New Features
Having been treated to a mid-cycle refresh that includes a new front end design, a new cockpit (on some trims), powertrain updates, and the introduction of the new AT4X trim level for the 2024 model year, the 2025 Sierra 2500 HD receives minor changes, mostly regarding the availability of features per trim level, as well as changes to the wheel lineup.
- See the complete list of 2025 GMC Sierra 2500 HD changes, updates and new features.
Powertrain
The 2025 GMC Sierra 2500 HD carries over the two powertrain options from the 2024 model year.
| Engine | Fuel | Aspiration | Transmission | Drivetrain | Horsepower @ RPM | Torque @ RPM | Axle Ratio |
|---|---|---|---|---|---|---|---|
| 6.6L L8T V8 | Gasoline | Atmospheric | 10-Speed Automatic (MKM) | RWD or 4WD | 401 @ 5200 | 464 @ 4000 | 3.73 |
| 6.6 L5P V8 | Diesel | Turbocharged | 10-Speed Automatic (MGM or MGU) | RWD or 4WD | 470 @ 2800 | 975 @ 1600 | 3.42 |
Towing
The 2025 Sierra 2500 HD tows a minimum of 14,500 pounds and a maximum of 20,000 pounds when using a traditional hitch. The max tow rating increases to 22,390 pounds when using a fifth wheel or gooseneck hitch.
- See the complete 2025 Sierra HD towing capacities
Production
The 2025 GMC Sierra 2500 HD is produced exclusively at the GM Flint plant in Michigan. Production began on August 19th, 2024.
Platform
The 2025 Sierra 2500 HD continues to ride on a heavy duty variant of the GM T1 platform. Otherwise known as GMT-T1 or T1XX, the architecture is designed for body-on-frame pickup trucks and body-on-frame SUVs.
Pricing
Pricing for the 2025 Sierra 2500 HD starts at $48,295, including the $1,995 destination freight charge.
- See the complete 2025 Sierra 2500 HD prices
Seating
The 2025 Sierra 2500 HD is offered in three seating configurations, seating either three, five or six passengers:
- Three-passenger configuration: this setup features a front 40/20/40 split bench seat (providing seating for three)
- Exclusive to Regular Cab models
- Five-passenger configuration (2-3): this setup features bucket seats in the front row (providing seating for two), along with a 60/40 bench seat in the second row (seating three), resulting in a 2-3 seating configuration
- Available on SLT. Standard on AT4, AT4X, Denali and Denali Ultimate.
- Six-passenger configuration: this setup features a 40/20/40 split bench seat in the front row (providing seating for three), along with a 60/40 bench seat in the second row (seating three), resulting in a 3-3 seating configuration
- Standard on Pro and SLE. Available on SLT.
Beyond 2025
We expect the fourth-generation Sierra 2500 HD to remain in production through the 2027 model year, at which point it will be overhauled for the next generation as a 2028 model.
- See more about the 2028 GMC Sierra
Sales
See running GMC Sierra sales numbers for global markets.
Discussion
Discuss the 2025 GMC Sierra 2500 HD in our GMC forum.
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