Most common 2015 GMC Sierra 2500 problems
Share of the 89 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
GMC Sierra 2500 complaints by model year
Best Sierra 2500 years: 2012, 2014, 2013. Years to avoid: 2024, 2025, 2020, 2021, 2022. Compare all years →
2015 GMC Sierra 2500 recalls (6)
Air bags › Side/window › Curtain › Inflator
General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500, 2500, 3500, and Chevrolet Silverado 1500, 2500, and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator, or the inflator sidewall may rupture.
Remedy: Dealers will replace the left and right side RRAB modules, free of charge. Interim owner notification letters informing owners of the safety risk were mailed on August 18, 2021.
Air bags › Side/window › Curtain › Inflator
General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500 and Chevrolet Silverado 1500 and 2015 GMC Sierra 2500 and 3500, and Chevrolet Silverado 2500 and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator.
Remedy: GM will notify owners, and dealers will replace the RRAB modules on the left and/or right side, free of charge. Interim owner notification letters were mailed on December 22, 2020.
Service brakes, hydraulic › Pedals and linkages
General Motors LLC (GM) is recalling certain 2015-2016 Chevrolet Silverado 2500, 3500, 1500 Crew Cab Special Service, Tahoe Police Pursuit/Special Service, GMC Sierra 2500, and 3500 vehicles. The brake pedal pivot nut may loosen, causing the brake pedal to be loose or inoperative.
Remedy: GM will notify owners, and dealers will add adhesive to the nut and reinstall the nut with increased tightness, free of charge. The recall began October 3, 2018.
Air bags › Frontal › Sensor/control module-inactive
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and…
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge.
Seat belts › Pretensioner
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra…
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge.
Service brakes, hydraulic › Pedals and linkages
General Motors LLC (GM) is recalling certain model year 2015-2016 Chevrolet Silverado 1500, 2500, and 3500 heavy duty trucks manufactured October 1, 2013, to February 1, 2016, 2015-2016 Chevrolet Tahoe Police Pursuit Vehicles (PPV) manufactured March 1, 2014, to February 1, 2016, and 2015-2016 GMC Sierra 2500 and 3500 heavy…
Remedy: GM will notify owners, and dealers will add adhesive to the brake pedal pivot nut and reinstall with an increased torque, free of charge. The recall began on March 14, 2016.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2015 GMC Sierra 2500:
Desiccated Air Bag Inflator Rupture
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited.
What 2015 GMC Sierra 2500 owners say
Lights all 26 →
Headlights were about as bright as a candle while using high beams changed the bulbs and used a head light restoration kit and within a week headlight lenses were hazed over again high beams are no brighter than low beams
The low beam projector headlights are inadequate, especially in rural areas. There is a distinctive cutoff of light, call it a line when on low beam, and beyond that line their is no illumination whatsoever as you would be used to with other lighting designs. You can not see any signs, possible animals, or anything else as you are used to seeing in the light that typically extends beyond other low beam systems. I understand that GM has a TSB for the condition but it is not advertised and from what I can determine on the net does not work regardless and is only a band aid fix. These lights are a safety hazard. I believe this issue May have contributed to an accident I had. ..updated 01/04/17
Fuel & propulsion system
The contact owns a 2015 GMC Sierra 2500. The contact stated while her husband was driving approximately 20 MPH, the vehicle lost motive power and stalled. The vehicle lost power steering and power braking functionality. The contact stated that her husband did not see any warning lights being illuminated. The contact stated that her husband pulled over and stopped the vehicle. The vehicle could not be restarted. The contact stated that her husband purchased a fuel head for the diesel engine. The fuel head was replaced, the vehicle was started, and ran for less than a minute when the contact heard loosened nuts and bolts coming from the engine compartment. The vehicle stalled and was towed to an independent mechanic. …
The contact owns a 2015 GMC Sierra 2500. The contact stated while driving at an undisclosed speed, the vehicle lost automotive power and stalled. No warning lights was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the Fuel Pump Module needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 129,000.
Electrical system
I was driving down the road after turning on the rear window defrost. The cab of the truck filled with smoke billowing from the back seat. I pulled over and turned the truck off. I got into the back seat to try to identify what was on fire, and noticed the lines of the rear window defrost system were actually smoldering. Then one of the rear windshield panels exploded in my face. Upon reading online, it looks like a recall was issued for this same problem in Canada but not the USA.
I turned on my rear defroster. I smelled electrical burning and rear window shattered with my 6 month old in the back seat in her car seat. GM states there is a recall which can be referenced as N192220470. Speaking with customer service and dealership the recall is VIN specific and my vehicle is not included in the recall even though the year and make is listed in the recall. Very dangerous, especially when there are passengers in the back seat of the vehicle
Frequently asked questions
Is the 2015 GMC Sierra 2500 a good car?
Based on 89 owner complaints filed with NHTSA, the 2015 Sierra 2500 rates avoid: 2.2× as many complaints as a typical year of the Sierra 2500 at the same age. It is one of the Sierra 2500 years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2015 GMC Sierra 2500?
The lights — 26 complaints, 29% of all complaints for this model year. Next are the fuel & propulsion system (12) and electrical system (11).
How many recalls does the 2015 GMC Sierra 2500 have?
There are 6 recalls for the 2015 GMC Sierra 2500, the most recent from July 1, 2021 (inflator). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the GMC Sierra 2500?
The best years by complaints, compared at the same age, are 2012, 2014 and 2013. Years to avoid or approach with caution: 2024, 2025, 2020, 2021 and 2022. See the full GMC Sierra 2500 years comparison.
At what mileage do 2015 GMC Sierra 2500 problems happen?
The median mileage reported in complaints is about 37,000 miles; 58% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.