2015 GMC Sierra problems & reliability
53 owner complaints filed with NHTSA for the 2015 GMC Sierra, alongside 6 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
1 complaint report injuries (1 injured).
Federal crash records (FARS 2020–2023): 2015 GMC Sierra vehicles were involved in 227 fatal crashes with 64 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Exterior Lighting → | 30 | 57% |
| Power Train | 6 | 11% |
| Steering | 6 | 11% |
| Air Bags | 4 | 8% |
| Engine | 2 | 4% |
| Seats | 2 | 4% |
| Service Brakes | 2 | 4% |
| Structure | 2 | 4% |
| Unknown OR Other | 2 | 4% |
| Electrical System | 1 | 2% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 7,500 miles (middle 50% between 2,750 and 18,667 miles), based on 27 complaints that included mileage.
Complaints by incident year
What owners report
“The contact owns 2015 GMC Sierra 1500. The contact stated that while driving on several occasions at various speeds, the vehicle lost motive power. The contact stated that the check engine warning light was illuminated for approximately a month. The vehicle was taken to an independent mechanic and the contact was…”
Fuel System, Gasoline · filed Apr 30, 2025
“The contact owns a 2015 GMC Sierra. The contact stated that while driving at an undisclosed speed, he became aware that the electronic power steering was not functioning properly, requiring increased effort to maneuver the vehicle. The vehicle returned to normal functionality, but the failure became a regular…”
Steering · filed Mar 20, 2024
“The contact owns a 2015 GMC Sierra 1500. The contact stated while driving 65 MPH, there was a loud pop in the engine compartment. The vehicle was steered to the side of the road where condensation was observed in the middle of the road. The vehicle was towed to a dealer where it was diagnosed that the radiator and…”
Engine and Engine Cooling · filed Jan 12, 2024
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
181 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2015 GMC Sierra. The 10 most recent:
This preliminary informational bulletin contains recommendations of what needs to be done to swap/install camper outside rearview mirrors on a vehicle not originally equipped with them.
PI1255E · Service Bulletin/Repair Instructions · issued Oct 25, 2017
This informational bulletin provides information on the temporary tire flat spotting condition.
03-03-10-007J · Service Bulletin/Repair Instructions · issued Jul 19, 2017
This technical bulletin provides a procedure to lube the rear leaf springs on vehicles with the condition of a squeak noise originating from the rear of the vehicle.
06-03-09-004H · Service Bulletin/Repair Instructions · issued Jul 17, 2017
This Preliminary Information communication provides information to the technician with the correct way to remove the front shock electrical connector terminals. Technician will need to slightly bend the end of the…
PIT5287C · Service Bulletin/Repair Instructions · issued Feb 8, 2017
This Preliminary Information communication provides information to the technician about vehicles that may have a bump feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition…
PIT5161E · Service Bulletin/Repair Instructions · issued Feb 8, 2017
This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its own at a full turn.
PIT3665E · Service Bulletin/Repair Instructions · issued Jan 31, 2017
This Preliminary Information communication provides information to the technician about vehicles that have a reduced or loss of power steering assist, steering wheel jerks or kicks back when turning, Service Stabilitrak…
PIT5405C · Service Bulletin/Repair Instructions · issued Jan 27, 2017
This Preliminary Information communication advises the technician that the Allison LCT1000 transmission valve body part number (24262535) tank is no longer on restriction through the General Motors Product Quality…
PIP5224D · Service Bulletin/Repair Instructions · issued Jan 27, 2017
This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System" message on the Driver…
PIT5509A · Service Bulletin/Repair Instructions · issued Jan 26, 2017
This Preliminary Information communication provides information to the technician about vehicles that have an excessive lateral driver or passenger seat movement and/or a clunk/click/pop type feeling or noise…
PIT5542 · Service Bulletin/Repair Instructions · issued Jan 25, 2017
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2015 GMC Sierra has 6 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2015 GMC Sierra?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 7,500 miles — budget accordingly if the car is approaching that mileage.