Table 1 shows one common electrical system related problems of the 2021 Buick Enclave.
| Problem Category | Number of Problems |
|---|---|
| Electrical System problems |
About six months ago the tailgate foot sensor failed and has not worked. Since then, the tailgate began randomly opening on its own, mostly when the car is parked and shut off, but as of today(4-28-2026) it started occurring while I'm driving. In addition to the hazard of items falling from my vehicle unto the highway and/or other cars, the only way for me to close the tailgate from the driver's seat is to place the transmission in park and push the tailgate button. Other than that, I must stop and get out and physically close it. Both actions are potential risks depending on my location and the traffic around me. I've brought this in to the dealership service department in January 2026 with this complaint, but was told they couldn't find anything wrong with it. In the meantime, it continues to get worse.
The trunk latching system malfunction even when it is set to off. When the vehicle is off or running it will open automatically then will not shut unless you turn the car on then shut the car off put on lock then unlock the car. While driving short distances the lift gate will open enough to trigger the alarm. I have woke up my trunk is open. It is safety for me and others due to exposure of material in trunk falling out. Safety for me sitting in car this happens all the time. I have called the dealer they want to charge $90 hr to diagnose and fix it.
Problem: the back hatch or trunk door pops open randomly on its own, many times a day. In a parking lot once. It hasn't happened while I've been driving. Safety issue because if it were to open while in public and a person wasn't in the vehicle, then anyone could enter the vehicle and theft could occur. Yes, the vehicle is available for inspection. A service center confirmed that it's the switch in the back hatch. No, the vehicle hasn't been inspected by manufacturer, police, or insurance. No, there haven't been any warning lights with this issue.
The contact owns a 2021 Buick Enclave. The contact stated that the door locks intermittently failed to operate as needed. The contact stated that the doors had failed to lock and to unlock as needed. The contact stated that the failure mostly occurred after it had rained. The contact related the failure to manufacturer communication number: 10211091. The dealer was notified of the failure and provided a cost for the diagnostic test and repair. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 62,188.
Power liftgate was functioning erratically and now it won't open at all. Currently there is no way to manually open the liftgate or access the rear of the vehicle without climbing through the vehicle to get to the trunk area. Electrical switches on inside, exterior of vehicle nor the keyfob will open the liftgate. Previously the liftgate opened on its own at unintended times and now it has simply quit working. Safety issue was when it was opening while driving. It is not currently doing this since it won't work anymore. Complete failure happened around 54k miles.
The rear switch on our tailgate has failed and it allows the tailgate to open/close randomly on its own while the vehicle is locked even. I contacted Buick about the problem and they said didn’t care, but this can happen while the vehicle is moving down the road as well as when parked. It’s not necessarily a typical safety issue that are normally recalled for, but it does pose significant safety issues if you want your car to be locked and you come back from the store and it’s not and people are free to break it or if it were to happen while moving. We had this happen on our car at around 38,000 miles. From reading other Buick forums to try and figure out what the cause is, it sounds like it’s a somewhat common occurrence. It’s alarming that it can open while the vehicle is locked.