2025 GMC Sierra 2500HD: Service Brakes complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 7 owner complaints for the 2025 GMC Sierra 2500HD that list the service brakes component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11753160 (filed 07/27/2026): “My 2025 sierra 2500hd repeatedly displays “trailer brakes disabled—service required” with a lithium- and solar-equipped trailer. the truck passes the el-52641 simulator, but the failure occurs intermittently while towing and resets after park or reconnecting the trailer. this closely matches the hig…”
- NHTSA complaint ODI #11744937 (filed 06/18/2026): “Normal driving 40mph brake failure and power steering loss. towed vehicle to dealership…”
- NHTSA complaint ODI #11735271 (filed 05/02/2026): “Power steering pump failed when decelerating after 9500 miles. when power steering pump fails, power assisted braking also fails. upon deceleration, i could not turn the steering wheel at all or stop the vehicle without extreme pressure on the brake pedal. i narrowly avoided impact with a concrete b…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Moderate
Pads and rotors are a common DIY job with hand tools and a jack; ABS/hydraulic faults need a scan tool. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
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