2025 Gmc SIERRA 2500 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
26 owner complaints analyzed
1 distinct recall campaigns
1,300 mi median reported failure mileage
Scope: 2025 model year. Data snapshot: . 4 complaints include usable failure mileage.
Most common problems
Steering is the most frequently named component, appearing in 7 of 26 complaints (26.9%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 10 | 38.5% |
| Steering behavior | 8 | 30.8% |
| Transmission and shifting | 2 | 7.7% |
| Engine operation | 2 | 7.7% |
| Electrical and battery issues | 2 | 7.7% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Steering | 7 |
| Service Brakes | 6 |
| Engine | 4 |
| Unknown Or Other | 4 |
| Power Train | 3 |
| Exterior Lighting | 2 |
| Suspension | 2 |
| Electrical System | 1 |
Steering: 7; Service Brakes: 6; Engine: 4; Unknown Or Other: 4; Power Train: 3; Exterior Lighting: 2; Suspension: 2; Electrical System: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 4 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 4; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (4). 22 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2025 | 15 |
| 2026 | 11 |
2025: 15; 2026: 11
Pattern summary
Steering leads the component reports. Braking behavior appears in 10 complaint narratives. Steering behavior appears in 8 complaint narratives. Transmission and shifting appears in 2 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11664044 · 2025-05-30 (May 30, 2025)
Experienced loss of power steering, loss of brakes
Owner-reported narrative. Look up ODI 11664044 at NHTSA ↗
Owner report 11682108 · 2025-08-21 (August 21, 2025)
We noticed that the brakes were really soft. We literally had to push on the brakes with excessive force. We took it to Lynch - West Bend, WI for a service call and was told that nothing was wrong with it. After leaving the dealership we did our own research (the hubby is a certified master technician himself). Come to find out through GM, contacts through TBM brakes and Duramax Forum.com "brake pedal effort" we found the issue and a solution and we fixed it ourselves. This truck is brand spanking new and the dealership threw their hands i…
Owner-reported narrative. Look up ODI 11682108 at NHTSA ↗
Owner report 11666150 · 2025-06-10 (June 10, 2025)
The contact owns a 2025 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, after driving over a small pothole on the road, the alignment was dramatically altered, causing the vehicle to slightly veer out of the intended lane even though the steering wheel was centered. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline fo…
Owner-reported narrative. 2,000 miles reported. Look up ODI 11666150 at NHTSA ↗
Owner report 11662707 · 2025-05-23 (May 23, 2025)
Transmission fluid overheating, which is a known issue in other GM models with 6.6L diesel with 12 speed allison transmission. Confirmed by warning message received on dashboard and transmission fluid temperature gauge. This occurred within 3 weeks of purchase. Dealer confirmed “Valve” needs to be replaced. Part is on back order with no arrival eta. Service advisor indicates the truck is not safe to drive and remains in the service department.
Owner-reported narrative. Look up ODI 11662707 at NHTSA ↗
Owner report 11698271 · 2025-11-07 (November 7, 2025)
transmission locked up 8 times from 1,050 miles to current 3,885 miles. It has happens each time around 40 mph. Each time it’s like hitting the brakes. The 8th time it locked really hard like slamming on the brakes. I’m worried with winter months what will happen on snow/ice covered roads. Called dealership and was told GM refuses to do anything until it completely fails. It seems they know what the problem is but refuse to fix till the truck stops moving during complete failure. No warning lamps and dealer ship says they can’t replicate it.
Owner-reported narrative. Look up ODI 11698271 at NHTSA ↗
Owner report 11684049 · 2025-08-30 (August 30, 2025)
While towing a less than 2000 lb trailer I had total loss of power steering when speeds dropped below about 5 mph. I got off interstate and was turning right at the end of exit ramp and I could barely turn the vehicle. At the next stop sign it did the same thing. I stopped turned off the vehicle and restarted it and it continued this for the next few miles. Then just as suddenly as it started it stopped doing this and worked fine the rest of my trip.
Owner-reported narrative. Look up ODI 11684049 at NHTSA ↗
Owner report 11753160 · 2026-07-27 (July 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 higher-trailer-battery-voltage/backfeed condition described in N232414840. Please open a TAC case and determine whether my 2025 has the revised Trailer Brake Power Module or whether GM engineering authorizes module replacement.
Owner-reported narrative. Look up ODI 11753160 at NHTSA ↗
Owner report 11759584 · 2026-08-25 (August 25, 2026)
My 2025 GMC Sierra 2500 experienced repeated electrical failures that caused complete battery drainage and multiple overnight no‑start conditions within the first year of ownership. These failures occurred in extreme desert heat, where temperatures in [XXX] reach 120°F. A vehicle that repeatedly fails to start in these conditions creates a serious safety hazard, including risk of heat‑related medical emergencies if stranded. The defect persisted despite multiple repair attempts and two battery replacements. The dealership ultimately told me I …
Owner-reported narrative. Look up ODI 11759584 at NHTSA ↗