The contact owns a 2017 GMC Acadia. The contact stated that the "Shift to Park" message was displayed on the instrument panel while attempting to park the vehicle. Additionally, there was a constant beeping alert coming from the vehicle during the failure. The contact later discovered that the rear brake lights and reverse lights were illuminated during the failure. A local dealer was contacted about the failure and made an appointment for a repair. The manufacturer was notified of the failure, and the contact was informed that the vehicle was not under recall. The vehicle was not repaired. The failure mileage was unknown.

- Donalsonville, GA, USA

Vehicle developed a major shudder and vibration from transmission. There are reports of the symptom in other complaints and a service bulletin released by GM for replacing the transmission fluid only(filter is internal and can only be replaced by removing and disassembling the transmission). When this malfunction is coupled with an EVAP sensor failure, loss of acceleration and engine stall occurs. The EVAP failure code did not appear for several weeks. I would suspect any type of engine miss will cause the same failure. Replacing transmission fluid does not remedy the severe shuddering from the vehicle.

- Lancaster, OH, USA

Sudden onset of extensive shuddering/shaking when shifting gears.

- Evansville , IN, USA

The contact owns a 2017 GMC Acadia. The contact stated that upon parking and turning off the vehicle, the message "Shift to Park" was displayed while the gear shifter was in park(P). The contact stated that upon restarting the vehicle and shifting out of park and shifting back into park(P) several times, the vehicle responded as needed. The dealer was notified of the failure and advised the contact to bring the vehicle in for diagnostic testing, and the dealer charged a fee for diagnostic testing. The vehicle was not yet diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 65,000.

- Concord, IL, USA

My car on has 54,000 miles on it. For the last two weeks it has started showing that it is not in park when it actually is and continues the warning until I have shifted back and forth at least 4-5 times to clear the message and then able to exit the vehicle. It will roll forward or back to some degree even though it seems to be in park but it messages that it is not. When calling our dealership they do not show a recall and state it will be $180 just to look at it, not counting repair for this. there have been no other warning in the system and no accidents at this time. I do have children that ride in this car and could cause a serious situation if the car were to roll or be in gear.

- San Angelo, TX, USA

Transmission shutters, shakes and jumps while accelerating. Forward collision warning will come on at any point even if there is no vehicles in front of me. I have contacted GMC but was told that it-??s a normal transmission issue

- Shelbyville , TN, USA

The "shift to park" warning light comes up every time I put my car in park. I have to move it back and forth multiple times to get it to acknowledge that its in park or the vehicle will not shut off. This is a dangerous situation in that the car could easily roll when I am not in it. I know that this is an ongoing issue with the 2017-2018 GMC Acadia and don't understand why GMC won't issue a recall for this. If this were to cause injury or an accident then they are 100% liable. I started having these issues about a week ago. My husband took it to the dealership and they told him that its not a recall or under warranty. I cannot afford to fix this myself at this point.

- Edmond, OK, USA

Car will not shut off. Shift to park problem

- Racine, WI, USA

The contact owns a 2017 GMC Acadia. The contact stated that the gear shifter acknowledged while shifting to park and activated the Press-to-Start button to turn off the vehicle. The message to shift to park was displayed on the instrument panel while the gear shifter was already in park. The dealer was contacted and confirmed there was no recall on the VIN. The vehicle had not been taken to the dealer. The vehicle had not been diagnosed or repaired. The manufacturer was informed of the failure. The manufacturer confirmed that the VIN was not included in a recall. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 36,000.

- Mertztown, PA, USA

The transmission in the car failed. These failures are a known problem with this vehicle and while attempting to get assistance from GM, they refused to offer any assistance, compensation or otherwise. I understand the transmissions in these models are part of a larger inquiry. I would like to be compensated for having to have the transmission completely rebuilt after less than 7 years of ownership. GM has known and willingly decided not to repair these. While outside of warranty, this is clearly a design and manufacturing flaw.

- Spartanburg, SC, USA

The error 'shift to park' continuously shows up on the dash area after I have shifted to park. All electronics that I can see stay on. I am not sure if other electronics that I can't see stay on. The vehicle engine will turn off with this message lit, but I cannot lock the doors.

- Gardner, KS, USA

While parking, cannot turn off the vehicle because of a warning to shift the transmission to park, even though the shifting mechanism is in the park position. Happens very frequently where sometimes up to 10 minutes trying over and over to safely park the car. Has been happening for all of 2024 but getting increasingly more difficult to park.

- Lewiston, ID, USA

The car will not shift into park from drive. When trying to park I have to shift from drive to park several times before it will finally go into park. It is getting worse.

- Shawnee, OK, USA

The contact owns a 2017 GMC Acadia. The contact stated while driving at an undisclosed speed, the transmission unexpectedly downshifted, with the shift to park message was displayed. The contact attempted to restart the vehicle, but the vehicle failed to shut off when the contact attempted to engage the parking brake. The contact forcefully engaged the parking brake to shut off the vehicle. The vehicle was taken to the dealer where it was determined that the transmission failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 13,000.

- Indianapolis, IN, USA

Violent shifting in the transaxle when vehicle is shifting between lowers gears. Transaxle causing a shuddering vibration on inclines. It feels like the engine is misfiring, but it is the torque converter/transmission/transaxle failing.

- Arroyo Grande, CA, USA

Many times after shifting the car into park, a message is displayed saying that the car needs to be put in park. It takes many time of turning the car on and off and moving the shift back and forth in order to get the message off and get the car to shut off. I notice that some 2017 and 2018 Acadia models have received recall notices addressing this problem. Our VIN number does not show up in the recall notices. Is there a reason why our car would not be covered as we have the same issue as cars that have received recall notices. Any help that you could provide would be very much appreciated. It is a very frustrating problem.

- Chaska, MN, USA

The contact owns a 2017 GMC Acadia. The contact stated that after parking the vehicle and shifting to park(P), the vehicle failed to shut off when the START/STOP button was pressed. The cause of the failure was not yet determined. The manufacturer and local dealer were contacted regarding the failure, but no assistance was offered. The failure mileage was 36,000.

- Warren, OH, USA

I was traveling at the posted speed limit of 80 mph on [XXX] in South Dakota at [XXX] and the GMC Acadia was working without any issue when all of a sudden various warnings flashed on the dashboard with one of them being power saver mode engaged. Within about 3 minutes various other warnings flashed and the vehicle motor turned off along with all of the electrical systems. Luckily, I was able to maneuver the GMC Acadia to the shoulder of the highway safely. The vehicle would not start and for about a minute or so we were trapped in the Acadia. We could not unlock the doors or wind down the windows until I pressed the start/stop bottom several times. Onstar did not work either. Once we could get out of the Acadia, my wife called 911 and in roughly 20 minutes or so, a police officer arrived at our location. We also called AAA and had a tow truck take the broken down GMC Acadia to a garage for repairs. It turns out that the alternator went bad and rendered our GMC Acadia useless in roughly 3 minutes from the initial warning. There was absolutely none of the tell tale warnings of a bad alternator. We did not see or observe any dim lights, hesitating starts or any other things associated with a bad alternator prior to the 3 minute warning before the vehicle completely was inoperable. We are very lucky to be alive. If [XXX] was more congested with traffic at the time of this incident, we might have been serious injured if not killed. IMO this GMC Acadia is a death trap. This vehicle warns the driver when the key fob-??s battery is low many weeks before it needs to be replaced. It should warn you more than 3 minutes if not several hours prior to the vehicle being completely immobilized. It should be noted that the check engine light came on several hours before this incident and I called Onstar and they ran the diagnostics and returned a P0420 code which is related to emissions. The check engine light turned itself off about 1 hour before incident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMAT

- Mount Joy, PA, USA

For over 2 years now I continue to receive "shift to park" message when I am already in park and trying to turn off vehicle. I can't shut off and have to shift to reverse and/or drive then back to park several times or shove the gear shift towards park for it to finally detect I am in park. I have been setting parking brakes out of fear vehicle will roll due to this issue. Yet, even with all my maintenance, if it doesn't happen during oil change or tune ups dealer nor repair shops aren't diagnosing and issue.

- Charlotte, NC, USA

I don-??t know specifically what component but feels like drive stuff. Yes it is available for inspection upon request. Driving during acceleration while entering highway vehicle started to surge or shutter almost total loss of vehicle acceleration and slowed down almost causing the vehicle behind me to hit rear of my vehicle. Mechanic says transmission issue and can be reproduced at times. Symptoms are gradually getting worse. No light other than tire pressure sensor.

- Jacksonville, FL, USA