The 2025 GMC Sierra 2500 HD receives a variety of small changes for the sixth model year of the heavy-duty truck’s fourth generation.
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.
Model Line
No changes. The trim level structure carries over from the 2024 model year:
- Pro (1SA)
- SLE (3SA)
- SLT (4SA)
- AT4 (4SB)
- AT4X (4SG)
- Denali (5SA)
- Denali Ultimate (5SB)
Exterior
- Spray-on Bedliner (CGN) now features the GMC logo on the back wall on AT4, AT4X, Denali and Denali Ultimate
- For the 2024 model year, the logo included on the back wall was trim specific:
- AT4 logo on AT4 trim
- AT4X logo on AT4X trim
- Denali logo on Denali and Denali Ultimate trims
- For the 2024 model year, the logo included on the back wall was trim specific:
- MultiPro Tailgate is now optional on the SLE trim (QK2)
- For the 2024 model year, the MultiPro tailgate was standard on the SLE trim, with the “regular” Standard tailgate (QK2) being optional
- For the 2025 model year, the Standard tailgate (QK2) becomes standard on the SLE trim
- Addition of 20-inch Bright face wheels with dark painted pockets (Q7J)
- Deletion of three wheel options:
- 20-inch machined aluminum wheel with bright Silver accents (Q7R)
- 20-inch multi-dimensional Chrome aluminum wheels (SKW)
- 20-inch Chrome aluminum wheels (SHL)
- Deletion of Redwood Metallic exterior color (G48)
Q7J (new for 2025)
Q7R (discontinued)
SKW (discontinued)
SHL (discontinued)
Redwood Metallic (discontinued)
- Rear Park Assist (UD7) deleted and replaced by Front and Rear Park Assist (UD5) on Pro and SLE
- For the 2024 model year, UD7 was optional on Pro and SLE, while UD5 was optional on SLT and standard on AT4, AT4X, Denali, Denali Ultimate
- For the 2025 model year, UD5 is optional on Pro, SLE and SLT, and standard on AT4, AT4X, Denali, Denali Ultimate
- Box Delete option (ZW9) removed from SLT Crew Cab models
- For the 2024 model year, this option was available for a brief period of time
Interior
- Cruise Control (K34) is now standard on Pro
- For the 2024 model year, this feature was optional on the Pro trim and standard on SLE, SLT, and AT4
- Adaptive Cruise Control (KSG) is now standard on AT4 and Denali
- For the 2024 model year, this feature was optional on both trims
- Feature remains standard on AT4X and Denali Ultimate
- Trailer Brake Controller (JL1) is now standard on Pro
- For the 2024 model year, this feature was optional on the Pro trim
Mechanical
- Addition of Universal Vehicle Module (KGU)
- This feature enables CAN readability of selected messages utilizing SAE J1939 formatting, offering 10-switchable inputs and outputs, and includes a graphical user interface to customize specific needs with more than 150 operating parameters available to read.
- Available on all trim levels.
- 120-volt power outlet within the instrument panel (KI4) is now standard on SLE
- For the 2024 model year, this feature was optional on the SLE trim
- 120-volt bed-mounted power outlet (KC9) is now standard on SLE
- For the 2024 model year, this feature was optional on the SLE trim
- Power Take-Off (PTO) eliminated from RWD models
- For the 2024 model year, this feature was available on 2WD and 4WD models alike
- Availability remains limited to Pro and SLE trim levels
- E85 fuel capability (FHS) removed from Regular Cab models
- For the 2024 model year, this feature was available on Regular Cab models with the naturally-aspirated 6.6L V8 L8T engine (gasoline) and trailer brake controller (JL1); it was not available with the pickup box delete option (ZW9)
The updates and changes described here are specific to the U.S. market and may be different for other markets.
Discussion
Discuss the 2025 GMC Sierra 2500 HD in our GMC forum.
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