2015 GMC Sierra 1500 problems and complaints
Owners have filed 819 complaints with NHTSA about the 2015 GMC Sierra 1500. The most-reported areas: Service Brakes (243), Exterior Lighting (130), Power Train (116).
Key takeaways
- 819 owner complaints on file with NHTSA.
- 29 involve a crash, 10 a fire, 14 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Service Brakes | 243 | 30% |
| Exterior Lighting | 130 | 16% |
| Power Train | 116 | 14% |
| Electrical System | 104 | 13% |
| Steering | 91 | 11% |
| Engine | 88 | 11% |
| Unknown Or Other | 72 | 9% |
| Air Bags | 43 | 5% |
| Structure | 32 | 4% |
| Visibility/Wiper | 21 | 3% |
| Suspension | 20 | 2% |
| Seat Belts | 16 | 2% |
One complaint can name several components, so shares add up to more than 100%.
Parts for the 2015 GMC Sierra 1500
GarageDex's verified specs for this car. Each Buy button searches Amazon for that exact part.
- Battery
- Engine oil
- Wiper blades
- Headlight bulb
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| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2015 GMC Sierra 1500 PU/EC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2015 GMC Sierra 1500 PU/RC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2015 GMC Sierra 1500 PU/RC 4WD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2015 GMC Sierra 1500 PU/EC 4WD | 5/5 | 5/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Suspension - filed 2026-11-04
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving 45 MPH, there was a thumping sensation coming from the vehicle. The contact believed that the issue was coming from the suspension. The contact had experienced a similar issue with a similar vehicle but an older model year. The vehicle was t...
Power Train - filed 2026-10-21
The 6-speed automatic transmission (6L80) developed a severe shudder during normal driving. A service center diagnosed the problem as torque converter clutch failure; the torque converter sheds metal debris through the transmission, so the transmission now requires a full rebuild quoted at approximately $6,000. The fai...
Engine - filed 2026-09-25
In August, 2019, at 93,672 miles, GM covered a lifter failure on our 2015 GMC Sierra, V8 AFM engine. Only the left side was repaired. Now, in 2026 at 130,000, the right side has the same issue and needs repair. The estimate to repair is $16,697. This is a known issue and a safety concern.
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More for the 2015 GMC Sierra 1500
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.