Which parts fail
Components named in complaints (doors, hood, frame, rust, paint and trim).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2015 GMC Sierra 1500 owners, lightly cleaned up (personal details are redacted by NHTSA).
Cross member holding file tank rusted through causing the fule tank to not be supported and shock mounts no longer support the shocks to frame causing shocks to bounce around with possibility to puncher fule tank or lines Also rear cross member that holders electrical components rusts off Excessive rust on top of fule tank causing a inability to make repairs without replacing fule tank in entirety
The body has rust coming through on the lower body panels by the rear doors of a crew cab. Have to replace the AC condenser on a 2015 gmc Denali. Looks like GMC already knows there is an issues with this, but no recall on the 6.2L sierra denalis.
Truck started to make loud clunking noise when driving taken it to two shops and wrong parts were installed as stated below. Bought from a used car dealership and they sold it as is now with the wrong parts.
Remotely started the vehicle this morning and came out to find it smoke filled and the rear defrost on driver's side window was on fire and smoking. It filled car with smoke and shattered the window.
Design flaw in cabin air filtration system leading to health hazard within the vehicle. On two occasions in my first 16 months of ownership, mice have entered the cowl air plenum area and built nests on top of and out of the cabin air filter material. Both times the filter has become saturated with mouse dander, feces and other materials. Eventually these contaminants work their way through the filter and an odor is noticed inside the vehicle. The mice are believed to enter this area through significant unscreened openings at the ends of a plastic cover over the plenum in the windshield wiper area under the hood. I have contacted GM with regard to this design flaw. Their only response was to establish their case number 711507394608. No further action was taken. So far, my dealer has continued to repair the damage and install new cabin filters. …
Design flaw in cabin air filtration system leading to health hazard within the vehicle. Mice have entered the cowl air plenum area and built nests on top of and out of the cabin air filter material. The filter has become saturated with mouse dander, feces and other materials. Eventually these contaminants work their way through the filter and an odor is noticed inside the vehicle. The mice are believed to enter this area through significant unscreened openings at the ends of a plastic cover over the plenum in the windshield wiper area under the hood. I have contacted GM with regard to this design flaw. . So far, my dealer has repair the damage and install new cabin filters at my expenses . Was told by dealer this was not covered under warranty no attempt has been made to block or screen the openings. …
This complaint is regarding excessive surface rust on not only the frame of my truck, but on critical engine component clamps in the engine bay. Any screw style hose clamp in my engine bay are rusted worse than my other 9 year old car with 102,000 miles on it. I wash my truck, including undercarriage, periodically throughout the winter to try and keep the salt off. My truck is a 2015 with 40,000 miles, and just recently, the rust had completely eaten through the lower radiator hose clamp causing all the engine coolant to leak out. I noticed the rest of the clamps within the engine bay to be in the same condition, along with the frame, and suspension components. …
The paint on my 2015 GMC Sierra is bubbling and peeling. After much research I found that this a consistent defect on my year vehicle. I contacted GMC and my dealer thorson GMC in pasadena california. The service manager at thorson GMC don schwartz had his body shop look at the paint on my truck and his response to me was that the paint on the chipping areas on my truck, both rear doors and the roof, was extremely thin and that he would try to get GMC to repaint my doors and roof at their expense. Two weeks later mr. Schwartz calls me back and tells me that GMC is only willing to pay 40% of a $5000 paint repair and that I would have to pay $3140 if I wanted my chips repaired. I feel that this is ridiculous to have to pay for an obvious factory defect. Additionally I really feel for the thousands of people facing the same problem because GM didn't paint their vehicles correctly
Headlights are inadequate on high or low beams. It seems that the light is focused into two narrow beams in an effort to make up for the low lumen level of the LED bulbs. These narrow beams don't light up enough of what is in front of you for night driving. I have to use my fog lamps to turn onto streets without street lights on the corner. The recirculating switch for the ventilation system will not even reduce the amount of outside air coming into the cabin, much less occlude it. Not good in 5 o:clock traffic or when your behind a diesel burner. The dealership acts like they are clueless and say everything is working as it should. After reading this form with so many headlight complaints, I asked if they had ever gotten any complaints like mine and they denied that they ever have; and they did it with a straight face!
Tl* the contact owns a 2015 GMC Sierra 1500. The contact stated that the weight of the trailer cord made the cord hang. As a result, the trailer brake became nonfunctional. The trailer could not haul heavy materials and was a hazard to the contact's safety. Also, "trailer brake fail" appeared on the instrument panel. The vehicle was driven to joe fuoco motor company (741 n 1st st, grand junction, co 81501, [phone]), but was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 42,000. The VIN was unknown.
Body complaints in other Sierra 1500 years
Frequently asked questions
How common are body problems on the 2015 GMC Sierra 1500?
NHTSA has 28 complaints about the body & structure of the 2015 GMC Sierra 1500, 4% of the model year's 719 complaints. The component named most often is body (26 mentions).
Is there a recall for 2015 GMC Sierra 1500 body problems?
No. NHTSA lists no body & structure recall for the 2015 GMC Sierra 1500, though it has 9 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2015 GMC Sierra 1500 body problems start?
Half of the complaints with a recorded mileage happened before about 50,000 miles, and 28% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 0 injuries to body & structure problems on this model year. If you notice symptoms, have the car checked before driving further.
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.