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 informed the high-pressure fuel pump was leaking fuel into the crank case, and the high-pressure fuel pump needed to be replaced. The vehicle was repaired; however, the failure reoccurred approximately 1 year and 5 months later. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the high-pressure fuel pump needed to be replaced. The vehicle was repaired. The contact stated that on several occasions while driving at various speeds, there was a loud sound coming from the engine compartment. The vehicle was towed to an independent mechanic where it was diagnosed that the fuel injectors on one side of the engine were not working properly, and that the fuel injectors needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 178,137.
The worst 2015 GMC Sierra problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Lights30
- Steering6
- Transmission6
- Airbags4
- Brakes3
- Body2
- Engine2
- Fuel system2
- Seats2
- Visibility2
- Driver assistance1
- Electrical1
- Suspension1
Specific symptoms reported on the 2015 GMC Sierra
Recalls 6
Electrical system: ignition
- What is wrong
- General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Silverado and GMC Sierra trucks manufactured January 24, 2014, to February 26, 2014, 2015 Chevrolet Suburban vehicles manufactured February 12, 2014 and Chevrolet Tahoe vehicles manufactured February 6, 2014, to February 13, 2014. In the affected vehicles, the ignition lock actuator may bind, making turning the key difficult or causing the ignition to get stuck in the "Start" position.
- Risk
- If stuck in the "Start" position, the ignition may suddenly snap back into the "Accessory" position, causing a loss of engine, steering, and braking power, increasing the risk of a vehicle crash. If the vehicle is in a crash, the air bags may not deploy, increasing the risk of occupant injury.
- Remedy
- GM will notify owners, and dealers will replace the ignition lock housing, free of charge. The recall began on November 20, 2015. Owners may contact Chevrolet customer service at 1‑800‑222‑1020 or GMC customer service at 1‑800‑462‑8782. GM's number for this recall is 15573.
Recall number 15V640000 · Recall details
Power train: axle assembly: axle shaft
- What is wrong
- General Motors LLC (GM) is recalling certain model year 2015 Chevrolet Silverado 1500, and GMC Sierra 1500 vehicles manufactured November 24, 2014, to November 25, 2014. Due to an improper heat-treatment, the rear axle shaft may fracture while the vehicle is being driven.
- Risk
- If the rear axle shaft fractures, the rear wheel may separate from the axle shaft, increasing the risk of a crash.
- Remedy
- GM will notify owners, and dealers will inspect the rear axles, and replace any that were improperly heat-treated, free of charge. The recall began on December 17,2014. Owners may contact GM customer service at 1‑800‑222‑1020 (Chevrolet) or 1‑800‑462‑8782 (GMC). GM's number for this recall is 14892.
Recall number 14V819000 · Recall details
Steering: electric power assist system
- What is wrong
- General Motors LLC (GM) is recalling certain model year 2015 Chevrolet Silverado, Suburban, Tahoe, GMC Sierra, and Yukon XL vehicles, equipped with electric power steering (EPS). Due to a problem with the EPS module, the affected vehicles may experience a sudden loss of power steering assist during vehicle operation.
- Risk
- An unexpected loss of power steering increases the risk of a crash.
- Remedy
- GM will notify owners, and dealers will replace the power steering assist motor kit, free of charge. The recall began on November 17, 2014. Owners may contact GM customer service at 1‑800‑222‑1020 (Chevrolet), or 1‑800‑462‑8782 (GMC). GM's number for this recall is 14743.
Recall number 14V719000 · Recall details
Seats
- What is wrong
- General Motors LLC (GM) is recalling certain model year 2013-2014 Buick Encore and Cadillac ATS; 2014 Cadillac CTS, ELR, Chevrolet Caprice and SS vehicles; and 2014-2015 Chevrolet Silverado and GMC Sierra Trucks. Due to an incomplete weld on the seat hook bracket assembly, the front seats in the affected vehicles may not stay secured in place during a high load condition such as a crash.
- Risk
- A seat that does not stay secured increases the risk of occupant injury in a vehicle crash.
- Remedy
- GM will notify owners, and dealers will inspect the seat hook bracket assembly weld and replace the lower seat track, as necessary, free of charge. The recall began on August 15, 2014. Owners may contact GM customer service at 1‑800‑521‑7300 (Buick), 1‑800‑458‑8006 (Cadillac), 1‑800‑222‑1020 (Chevrolet), and 1‑800‑462‑8782 (GMC). GM's number for this recall is 14340.
Recall number 14V446000 · Recall details
Power train: transfer case (4-wheel drive)
- What is wrong
- General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Silverado and GMC Sierra vehicles, and model year 2015 GMC Yukon and Chevrolet Suburban and Tahoe vehicles. In the affected vehicles, an electrical signal short may cause the transfer case to shift to neutral without the driver's input.
- Risk
- If the transfer case switches to neutral while the vehicle is parked and the parking brake is not in use, the vehicle may roll away increasing the risk of injury to bystanders. If the transfer case switches to neutral while the vehicle is being driven, the vehicle would lose drive power, increasing the risk of a crash.
- Remedy
- GM will notify owners, and dealers will re-program the software in the transfer case control module, free of charge. The recall began in early August 2014. Owners may contact General Motors customer service at 1‑800‑222‑1020 (Chevrolet), or 1‑800‑462‑8782 (GMC). GM's number for this recall is 14192.
Recall number 14V374000 · Recall details
Engine and engine cooling: exhaust system
- What is wrong
- General Motors is recalling certain 2014 model year Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles, and 2015 model year Cadillac Escalade and Escalade ESV; Chevrolet Silverado HD; and GMC Sierra HD, Yukon, and Yukon XL, equipped with a 4.3L engine or 5.3L engine.
- Risk
- The overheated exhaust components may melt nearby plastic parts and may result in an engine fire.
- Remedy
- General Motors will notify owners, and dealers will reprogram the engine control module, free of charge. The recall began on January 16, 2014. Owners may contact Chevrolet at 1‑800‑222‑1020 and GMC at 1‑800‑462‑8782. General Motors' number for this recall is 14008.
Recall number 14V007000 · Recall details
Technical service bulletins for the 2015 GMC Sierra 181
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This preliminary informational bulletin contains recommendations of what needs to be done to swap/install...
- This informational bulletin provides information on the temporary tire flat spotting condition.
- This technical bulletin provides a procedure to lube the rear leaf springs on vehicles with the condition...
- This Preliminary Information communication provides information to the technician about vehicles that may...
- This Preliminary Information communication provides information to the technician with the correct way to...
- This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable...
- This Preliminary Information communication advises the technician that the Allison LCT1000 transmission...
- This Preliminary Information communication provides information to the technician about vehicles that have...
- This Preliminary Information communication provides information to the technician on how to diagnose and...
- This Preliminary Information communication advises the technician that some vehicles may have a dim Driver...
2015 GMC Sierra fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 4.3L 6‑cyl | RWD | 16-18 | 21-24 | 18-20 |
| 5.3L 8‑cyl | RWD | 15-16 | 20-23 | 17-19 |
| 4.3L 6‑cyl | 4WD | 16-17 | 20-22 | 18-19 |
| 5.3L 8‑cyl | 4WD | 15-16 | 19-22 | 17-18 |
| 6.2L 8‑cyl | RWD | 15 | 21 | 17 |
| 6.2L 8‑cyl | 4WD | 15 | 21 | 17 |
What 2015 GMC Sierra owners say
Most recent owner complaints, unedited.
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 occurrence. The power steering warning light was illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to the federal safety agency Campaign Number:Â 18V586000 (Steering), but the VIN was not included. The manufacturer was notified of the failure but did not assist. The failure mileage was 90,000.
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 transmission needed to be replaced. The vehicle was not repaired. On another occasion, while driving at approximately 20 MPH, the vehicle lost motive power. The vehicle was towed to a dealer where it was determined that the engine needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was approximately 170,000.
The contact owns a 2015 GMC Sierra 1500. The contact stated while driving approximately 35 MPH, the message "Power Steering Assist" was displayed, and the steering wheel became very difficult to turn in either direction. The cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure and informed the contact that the vehicle was not included in the federal safety agency Campaign Number: 14V719000 (Steering). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 131,890.
The contact owns a 2015 GMC Sierra. The contact stated that when doing the initial start, the rear of the vehicle began smoking and caught on fire. The contact turned off the vehicle and the fire settled however shortly after the rear window fractured. There were no injuries and no medical attention needed. There was no fire report. The contact had taken the vehicle to the dealer who stated that the window needed to be replaced and there was a Canadian recall (Manufacturer Number N192220470 ) for the rear windows defrost failing. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 152,000.
The contact owns a 2015 GMC Sierra 1500. The contact stated her husband was driving when the vehicle in front of them applied the brakes unexpectedly, the driver depressed the brake pedal but failed to stop the vehicle due to the brake pedal being resistant/ rigid causing the vehicle to rear-end the other vehicle. The contact stated no warning light was illuminated. The air bags did not deploy. The contact stated no one was injured nor sought medical attention. A police report was filed. The driver was able to continue driving to their destination. The contact took the vehicle to the local dealer, where it was diagnosed that the vacuum pump had to be replaced. The dealer replaced the vacuum pump back in October of 2022. The vehicle was repaired but the second vacuum pump was also defective and the dealer replaced it on-site for a third time. The vehicle was repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 85,500. The contact stated that the failure speed was no more than 70 mph.
The contact owns a 2015 GMC Sierra. The contact received notification of the federal safety agency Campaign Number 21V504000(Air Bag) however, the part to do the recall repair was unavailable. The local dealer was contacted and it was confirmed that the part was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue and confirmed that the part was currently on backorder. The contact had not experienced the failure. The VIN tool confirms parts distribution disconnect.
The contact owns a 2015 GMC Sierra. The contact received notification of the federal safety agency Campaign Number: 21V504000 ( Air Bags ) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Vin tool confirms parts distribution disconnect.
2015 gmc sierra. Consumer writes in regards to roof rail airbag (rrab) inflators safety recall. * recall remedy is not yet available. * ts the consumer was informed the parts to complete the recall repair were not yet available. The consumer referenced recall n202324251. The consumer stated the manufacturer exceeded a reasonable amount of time completing the recall repair.
The projector headlights are inadequate on a level road, and are dangerous on rolling terrain roads and curves. They could be possibly designed for stationary use in a perfect enviorment but not for moving vehicles, I cannot safely drive this vehicle at night, I fear not only for myself but for other people on and near the path of this vehicle. My mind is clear, there are many blowing the whistle.
Compare the 2015 GMC Sierra
Other model years
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Questions about the 2015 GMC Sierra
Is the 2015 GMC Sierra reliable?
Owners have filed 53 complaints about the 2015 GMC Sierra, close to a typical Sierra model year.
What is the 2015 GMC Sierra year score?
The 2015 GMC Sierra scores 73 out of 100 (average). The score compares it with the other model years of the GMC Sierra: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2015 GMC Sierra?
Lights, with 30 complaints, typically around 1,000 miles. Next is steering (6).
How many recalls does the 2015 GMC Sierra have?
6 recalls, covering electrical system, power train and steering.
What year does the GMC Sierra have the most lights problems?
The GMC Sierra model years with the most lights complaints are 2014 (63 complaints), 2015 (30 complaints) and 1996 (14 complaints).
What gas mileage does the 2015 GMC Sierra get?
Official estimates for the 2015 GMC Sierra range from 17 to 20 mpg combined. The most efficient version (4.3L 6-cyl, RWD) gets 16-18 city and 21-24 highway.
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