2014 GMC Acadia electrical system problems

“On Sunday June 7, 2026 my husband drove our 2014 GMC Acadia to work. We both work at MSY - Louis Armstrong New Orleans International Airport for United Airlines. After he parked in the employee garage that is located in at the old terminal and got on the employee shuttle, the passenger tail light sparked a fire. Airport operations responded with the fire department that is stationed at the airport.”

“The contact owns a 2014 GMC Acadia. The contact stated that while driving approximately 20 MPH, the transmission shifted from 2nd gear to 3rd gear, and the vehicle shuddered before shifting. The failure also occurred while shifting from 4th gear to 5th gear. The contact ran a diagnostic scan and retrieved information for a loss of communication between the TCM and BCM. The failure was intermittent, and there was no warning light illuminated during the failure. The contact stated that the failure was associated with NHTSA Campaign Number: 14V614000 (Electrical System); however, the contact was advised by a local dealer and the manufacturer that the VIN was not included in the recall. The vehicle was not repaired. The failure mileage was approximately 147,000.”

“After I put my car in park my daughter and I were still in the vehicle for a few minutes getting our things with the engine still running. I got out to get something from the back seat, my daughter got out the passenger door and made it to the driver side as I was closing the back passenger door. I was about to get back on the car to get the rest of my things and turn the ignition off but before I could my car was rolling backwards out of the driveway into the street. I was able to jump in the vehicle and put my foot on the brake and the put the gear into Park. There’s no way possible I didn’t put it in Park with me getting out already and my daughter couldn’t have accidentally shift the gear because she couldn’t have been able to get out, close the door and make it to the driver side before it started rolling away. Once I got the car stopped, I noticed the driver seat was now all the way to the steering wheel and completely to the floor with the headrest also tilting inwards and now the electrical for the seat will not work. There is a recall for this issue but my vin# is not included. I cannot even drive my car now because the seat is so far up and inclined.…”

“My 2014 GMC Acadia constantly displays “Service Stabilitrak,” “Service Traction Control,” ABS, brake, and check-engine warning lights. The vehicle will not accelerate past 40 mph under normal driving. Recently, the vehicle began showing “Engine Power Reduced” randomly without any warning, and the vehicle loses power suddenly. The OBD2 code P1682 (Ignition 1 Circuit/Relay failure) appears every time. This issue has caused the vehicle to jerk, lose acceleration, and even stall in the middle of an intersection during rush-hour traffic while my children were in the car, creating a serious safety hazard. These warnings and symptoms are constant, and the power-reduction events occur unpredictably. No official inspection has been completed by the manufacturer. The failed component is still in the vehicle and available for inspection. The malfunction affects traction control, stability control, braking systems, and engine power, putting occupants and other drivers at risk.”

“The contact owns a 2014 GMC Acadia. The contact stated that while at a stop, the vehicle experienced a loss of automotive power. In addition, the contact stated that upon further inspection, the fuel gauge failed to properly display the fuel level. No warning light was illuminated. The vehicle was towed to a local independent mechanic, where the unknown repairs were made; however, the traction control, ABS, Stabili-trak, and seat belt warning lights illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. In addition, the contact related the failure to NHTSA Campaign: 14V614000 (Electrical System), 14V266000 (Seat Belts), 21V246000 (Air Bags), and 14V223000 (Electrical System, Fuel System, Gasoline); however, the VIN was not included. The manufacturer was made aware of the failure. The failure mileage was approximately 130,000.”

“Vehicle is randomly stalling or going into limp mode when driving. Has done it in intersections, driving down the hight way and even stopped in a parking lot. No warning but throws codes unrelated to the problem. I’ve been told that it shuts off half of my engine randomly while running and that contributes to the stall. Can cause accident if stalls while turning or even if in wrong lane on high way. You loose all power steering and basically have to coast to safety. Sometimes it re starts some times your stuck there with no reasons for it to not re start. Usually it starts same day when this happens but hours later. Sometimes it stutters and you know it’s coming but not often will you get this warning. I’ve replaced every thing in every code it’s thrown and still can’t go a week without stalling out. Very unsafe for families just trying to go anywhere. Has done in an hour into a trip or three minutes down the road. All weather conditions as well. I’ve had it to two different garages with no luck yet. Have found a bulletin on wiring for the fuse box which seems promising for the issue but am worried about putting more money into something so unreliable. At this…”