REAR SLIDING GLASS WINDOW DEFOGGER CONTACTS ARE SMOKING AND MAKING SIZZLING NOISE. FIRE HAZARD. HAD TO REMOVE FUSE NUMBER 10 FROM ENGINE BLOCK TO PREVENT AUTO START FROM ENGAGING REAR DEFOGGER IN COLD WEATHER, OR TO PREVENT DEFOGGER SWITCH FROM BEING ENGAGED BY FAMILY MEMBER. 46K MILES 2015 GMC SIERRA
2015 GMC Sierra electrical problems
severe 61 complaints filed with NHTSA · avg repair $850
Complaints
61
Recalls
0
Crashes
1
Avg fix
$850
What owners are reporting 5 most recent
Rear defroster (with sliding rear window) thermal events with arcing and hissing, smoke smell present. Matches the same description as provided in document N192265660. GM will not cover my vehicle because it was not delivered to a dealer in any of the states listed in the document. There is evidence in the vehicle of thermal events, however GM wants me to pay $1000-$1500 for a new rear sliding …
TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT WENT TO AUTOSTART THE VEHICLE AND NOTICED THAT THE REAR WINDOW WAS SMOKING AND EMITTING A BURNING ODOR. THE CONTACT TURNED OFF THE AUTO REAR DEFROSTER AND THE REAR WINDOW SHATTERED. THERE WERE NO INJURIES. THE CONTACT TOOK THE VEHICLE TO WEST HERR CHEVROLET OF HAMBURG (LOCATED AT 5025 SOUTHWESTERN BLVD, HAMBURG, NY 14075, 877-308-1785), BUT …
HEADLIGHT ON THE 2015 GMC SIERRA 1500 SLT ARE TERRIBLE. THEY ARE THE WORST OF ANY VEHICLE I'VE DRIVEN. THE PROBLEM STEMS FROM THE POORLY DESIGNED REFLECTOR FOR THE HALOGEN BULB.
SUPPOSEDLY THE BRAKES HAVE BEEN FIXED FOR THE RECALL, HOWEVER, IF I AM DRIVING AS LOW SPEEDS LIKE IN A PARKING LOT, THE ABS WILL KICK IN CAUSING ME TO NOT COME TO A STOP WHEN NEEDED. I HAVE ALMOST HIT SEVERAL VEHICLES DUE TO THIS ISSUE. I HAVE ISSUES WITH THE RADIO WORKING, SPECIFICALLY BEING ABLE TO ADJUST THE SOUND LEVEL. I HAVE ISSUES WITH THE MIRRORS BEING ABLE TO MOVE LIKE THEY SHOULD. BO…
Common questions
How serious is the electrical problem on the 2015 GMC Sierra?
It's a meaningful issue. 61 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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