Vehicle will not shut off as it shows shift to park. Reoccurring problem.

- Oshkosh, WI, USA

The six speed transmission always exhibit bucking/hesitation when shifting from 1st gear to 2nd gear. Also, when speed between 40mph to 50mph, the transmission exhibit severe hesitation to downshift when press throttle pedal. Moreover, the transmission exhibits harshness when downshift when decelerating from 45mph to 0mph.

- Pinehurst, NC, USA

Shift to park error, on computer display.

- Moffit, ND, USA

The contact owns a 2018 GMC Acadia. The contact stated that the vehicle was started remotely while still in park, however it independently shifted out of park and into reverse. The contact stated that the vehicle traveled across the yard onto the main road and crashed into a building. A police report was not filed. The vehicle was taken to an independent autobody shop but the failure was not diagnosed. The manufacturer was not made aware of the failure. The failure mileage was 16,972.

- Levittown, PA, USA

Place shifter in "park", turn off engine, and get "shift to park" message on console. While message is displayed, the car constantly beeps, warns, lights not turning off. Have to start the engine back up, and place the shifter into drive and then back to park. Sometimes have to do this 5-10 times in order for the car to turn off. This first happened at 11K miles (under warranty) and dealership fixed. I am now at 16K miles and it is happening again (out of warranty this time).

- Danville, CA, USA

Car would shutter on acceleration. RPM gauge would jump when accelerating or downshift to pass/climb hill. Dealer found problem with torque converter. Metal through out transmission (see attachment for specifics as noted by mechanic)

- Hardy, VA, USA

Car displays 'shift to park' message after transmission gear selector has been placed in park. Car will not turn off and the tires roll freely. After numerous attempts of shifting in and out of park the car will finally recognize that it is in park and allow you to turn off the vehicle as well as lock the transmission.

- Sidney, MT, USA

Every time I put the car in park position the car doesn't sense that it's on park and error message keeps appearing in the screen saying 'shift to park' and the car refuses to turn off and it roll away from the drive way and I have to shift it back to drive and again to park again and again multiple times till the sensor feels it. It's a safety hazard. I looked up the issue online and found out that most of this car owners experience the same problem and there's multiple lawsuits against GMC for this issue. This car is driven by my wife most of the time and she has my kids with her in the car. It's a life threatening issue! I took the car last month to the dealership and they refused to fix it for free because the car went out of warranty by only 2K miles, and I couldn't take the car to the dealership when this issue started because of the covid. By the time we could visit the dealership we already drove over 5K miles and that puts the car outside the warranty limit.

- Oviedo, FL, USA

Left front half shaft fractured. Was making a turn on highway. Vehicle has 53262 miles.

- Wellsville, NY, USA

The contact owns a 2018 GMC Acadia. The contact stated that while the vehicle was in a stand still and turning off the vehicle, the vehicle would start to bing, lights would stay on, and doors would not lock. The shift to park message displayed on the instrument panel. The vehicle was taken to get repaired where the manual transmission mode switch was replaced, however the failure persisted. The vehicle was taken to a local dealer (chesrown Chevrolet Buick GMC located at 1701 columbus pike, Delaware, oh 43015) where it was diagnosed that the shiftier assembly needed to be replaced. The vehicle had not been repaired as of yet. The manufacturer had been informed of failure, however no assistance was offer. The failure mileage was approximately 38,000. The consumer stated the vehicle display "shift into park" error. When placing it in park. The vehicle's headlights and interior lights remained illuminated, as well as the radio. Also, the doors would not lock. The consumer stated the section of the shifter that bolts into the floor needed to be replaced. Vehicle was repaired.

- Cardington, OH, USA

Vehicle does not recognize when it is in park. At times vehicle will not go into park and makes me concerned for my family's safety. My understanding is that GM is aware of this issue.

- Georgetown, KY, USA

When trying to put in park won't shut off says shift to park, started around 25,000 miles have to be sure vehicle is level and not on an incline. Vehicle also surges at times loosing power when you're going down the highway. Also, at times when you go to start vehicle it will hesitate and disconnects from battery thus resetting everything. Had to replace battery at 25,000. The rear wiper will go on it's on without turning it on.

- Camden, AR, USA

The transmisduon shifter when shifted into park, the information center said vehicle not in park and it will not let me shut the car off it was a 400$ repair at the GM dealership not covered under any of my warranty

- Waterford, MI, USA

Whenever the vehicle was put in park and I attempted to shut it off, it would give me the shift to park error code and would not let me cut the car off completely. It would happen just about every time I drove it. I just got it out of the shop for the third time and was told this time they replaced the assembly. So far it has not happened again but it has only been a week. It started back in January 2020.

- Pooler, GA, USA

2018 GMC Acadia shown 'shift to park' message even car is stopped/ parked.

- San Francisco, CA, USA

Gear shifter moves to park position but indicators and engine off switch will not switch to park state without jiggling shifter handle tip.

- College Station, TX, USA

Shift to park. Would not shut down or could not lock vehicle. Warning light & beeping sound.

- Mineral Wells, WV, USA

The car would not turn off when put in park when the car was stopped. The engine would turn off, but the electrical devices (lights, radio, odometer readings, etc.) would remain engaged. The warning indicator said the vehicle was not in park and it would take 5-10 minutes of turning the engine on and off, and shifting back and forth in and out of gear before the car would turn off completely. A search on line indicated several people complaining of the same issue. This car is 2 yrs old with less than 40K miles. It was maintained as a company leased vehicle by us before being purchased by us, so we know it has been properly maintained. We ended up having to have the shift column replaced.

- Chesapeake, VA, USA

My car keeps giving notice of it not being in park, when its clearly shifted into park. It wont shut down, let you lock doors. Just beeps until it finally realizes its in park. Even after continuously re shifting into park. Worse in the summer months. It needs to be fixed as many others are having the same issue!

- Abilene, TX, USA

When I shift the to park and try to turn off my car the shift to park lights up and I have to down shift and then shift to park again to get my car to shut off also the air compressor has already quit working with less than 40K miles on it.

- Alicia, AR, USA