Equipment Problems of GMC Acadia - part 1

I was driving on a two-lane road when unexpectedly my front moonroof spontaneously shattered sending glass down on top of me, the console area, and the passenger and rear seating areas of my 2025 GMC Acadia. It happened without warning and no external factors. It was a pleasant sunny November day. The moonroof was not open at the time. Fortunately no one else was in the vehicle with me at the time and no other cars were nearby since the two-lane is not a heavy traffic area. This put my safety at risk and could have put others at risk had others been in the vehicle or nearby since I was startled and had the natural reaction of crouching over and down in an attempt to protect myself therefore taking my eyes off the road and not paying enough attention to driving the vehicle. Glass could have fallen and hurt other passengers. The remaining moonroof glass crackled and I then looked up in shock wondering what happened and then feared glass fall into my eyes and immediately looked down away from the moonroof. I had just left my residence before the incident and was less than two miles from home. I found the next available place to turn around and drive back to my home and exit the vehicle. I then called the dealership I bought the vehicle from in January 2025, new. I also called gm customer service to seek assistance. The vehicle has 7125 miles. There were no warning signs. The incident happened today and no one has inspected the vehicle and its damage. A customer service case was opened with gm. I sent pictures to the dealer service manager who said he attached the pictures to my gm case online.

The put in park shows after engine is turned off, have to restart and shift out of park and back to park. This could take several times to accomplish.

See all problems of the 2019 GMC Acadia 🔎.

GMC customer care representative & local GMC service department supervisor unable to help. 2017 Acadia shift to park message. It’s difficult to turn the car off. The vehicle refuses to acknowledge the park position. Potential rollaway hazard. You may inspect. Took it to GMC service & confirmed it is a prevalent issue: transmission control 13534320 = gearshift assembly & jumper harness 84733196. This problem has been recurring for several years and I have problem solved how to shut the car off. GMC customer care rep said it’s an issue with all 2017 Acadias and tried to help. The system deemed it complicated case & escalated it to a supervisor. She read a “customer care” script. After talking, she admitted that realistically GMC would not help. Yesterday, she advised me to file a complaint with NHTSA. I read that 2 other states ohio & tennessee won class action lawsuits because of the hazardous shift to park issue. If GMC issued recalls for 2017 Acadia shift to park then my 2017 GMC Acadia should have been included. I have been waiting for the recall for several years. GMC admits the problem is prevalent in 2017 GMC Acadias. Would you please issue a recall associated with this issue and link it to my VIN. Thank you.

See all problems of the 2017 GMC Acadia 🔎.

I purchased this 2025 GMC Acadia on 3/29/2025. About a week into owning it, the navigation stopped working. Onstar was able to reset my system. Then, about a month later, the vehicle locked my keys in the cabin without my knowledge. Onstar was able to unlock my vehicle remotely. Then, on 10/23/2025, I noticed my navigation was not showing my true location. I tried the google assistant, and it wasn't connected. After further investigation, my wifi hotspot was not working either, along with other connectivity apps. I researched how to manually reset my system and followed all prompts; that did not fix the problem. I pressed the onstar button, and nothing happened; no connection. I thought that maybe the vehicle needed to cycle a few times. I let this continue for about a week before calling onstar from my phone. They told me to press my sos button; if it didn't connect, then I would need to take the vehicle to the dealership. So I took it to the dealership 11/6/25. They tried to download the update to my vehicle multiple times, over 6 hours at the shop, and the vehicle wouldn't accept the update. It is determined that the onstar telematics control module is defective. The dealership says the part is backordered, and they do not have an eta for arrival. After perusing the gm/onstar forums, I am seeing that this is a repeated issue for many customers on vehicles as old as 2018, and the part doesn't come for 6 months or more in most cases. It does seem more prevalent with vehicles 2022-current. The issue here is that onstar is touted as a safety feature, and I have been given 3 years of free onstar service. I am unable to utilize the service (roadside assistance, accident assistance, and navigation) and many other features because of this. Gm is aware that this is an issue, and the module is backordered when it should be readily available, since these issues seem to be commonplace. My brand new vehicle should work without issue and should be repaired promptly.

I have owned this vehicle less than 5 years and it has had the "shift to park" error 3 times and has now been replaced 3 times. The 2nd time was in August 2023 and yesterday it had to be replaced again. I don't understand how a part can fail this rapidly when the vehicle is only being driven approximately 10,000 miles per year. It only has 82,445 miles. I would like for gm to issue a recall for this issue or advise who the manufacturer is of the switch part number 84955381 and harness part number 84733196. The parts are not that expensive but the labor to replace was $ 462. 50 and total parts was $ 55. 56 on the invoice yesterday. As this is an ongoing issue I would like reimbursement. I am widowed and living on one income.

See all problems of the 2018 GMC Acadia 🔎.

Recently took vehicle for alignment for a pull to the right. After 3 alignments at the dealership I was told the rack and pinion gear sensor shorted out causing the vehicle to pull to the right. Also the exhaust has a rattle in the resonator confirmed by 2 sources. I asked the dealer to fix years ago under bumper to bumper and TSB pit5863. I was told not enough techs and not enough time so now the warranty is expired and the issue isn't fixed.

See all problems of the 2021 GMC Acadia 🔎.

My Acadia has the shift to park default it has been fixed 3 times and now it is popping up again for the 4th time which means I can't turn my vehicle off it takes forever to get it to go off please help please help.

I have a 2021 GMC Acadia that keeps saying steering assist not available. But when it does this, the temperature gage stops working and so does the ac. After you turn the car off the fan still runs for at least 10 minutes.

Vehicle is showing message of “shift to park” while trying to turn ignition off and currently in park. There is a current recall but it is saying this vehicle is not included in recall.

I have had multiple sensor issues with my Acadia since reaching 60000 miles. Currently, there is a thermostat sensor causing hard shifting, no cold air blowing from the ac, stabilitrack, traction control, steering assist reduced and fan running after turning off. I would not report it but I am in a facebook group where multiple people are reporting having the same issue in their Acadia's.

See all problems of the 2022 GMC Acadia 🔎.

The transmission in my 2017 GMC Acadia needs to be replaced. According to an article from qulll&arrow, llp, transmission problems affected the 2017, 2018, 2019 and some 2020 models, however, my VIN number is not included in this. I am reporting this so it can be documented in case other owners come forward and a pattern can be established.

Vehicle has shift to park message, and will not allow the vehicle to shut down even though the vehicle is in park.

Unknown.

See all problems of the 2011 GMC Acadia 🔎.

When I park and then turn the car off the car fails to recognize that the gear shifter is in the park position. As a result, the car doesn’t fully shut down, leaving the engine running or the electronics active. This drains the battery. I have seen this issue is recalled for other 2019 Acadias but don’t under why it is not recalled in mine. I’m afraid I’ll be out and about and unable to turn my car off resulting in a dead battery and being stranded.

Check engine light comes on, temperature gauge stops working, driving assist reduced notification, engine fan runs on high only. Temperature gauge and sensor were replaced 27,000 mi ago when this happened before.

When the vehicle is put into park and I turn the vehicle off I get an alert on my console saying "shift to park". I called gm customer service and was told "harness" had been replaced in 2020. I bought the vehicle in 2021. Last year I had to replace the "harness" and it is doing it is now doing it again.

Shift to park message, and chime remain on after car shift handle is already placed in park. Car rolls. Ongoing problem/defect well documented/reported among other similar units.

At startup today vehicle displayed “brake assist failure. Press hard to brake. Speed limited. ” it also displayed “service. ” it also displayed “esc,” and the word “service. An internet search indicated this may be a common problem of this vehicle, caused either by a software error in the electronic brake control module, or due to a defective brake master cylinder. There is a gm service notice for these defects, n242471431. Regardless of the cause, the brake is extremely mushy, and requires a high degree of force to stop the vehicle. Gm says there is no recall due to this defect. This is a brand new vehicle and therefore it must be a defect in the vehicle. Given that braking is a fundamental safety issue, it’s hard to believe there is no recall already issued.

Shift to park. Car will not register as in park. Have previously had issue fixed and has started again. Was told this is a common reoccurance and would likely happen again over time even if I pay to have it fixed again. Yesterday I spent 45 minutes trying to get the car to turn off. If it says shift to park the car will not shut completely down and there is nothing that can be done. I spoke with GMC for 30 min and was finally told to unhook the battery because they have no way to make it shut off without going to a dealership which was closed at the time.

My 2018 GMC Acadia has had the "shift t park" alarm and indicator going off after my car is turned off and in "park" it only happens intermittently, but frequently enough to be annoying. The dealer and gm told me because my VIN wasn't in their recall range, they would not honor the recall. This has been happening since I purchased the car in 2018.

Battery saver ignited comes on and and the entire dash flickers and turns off ! this happened in a middle of an intersection and I could move my car. We jumped it and went to the nearest auto zone replaced the battery . It was pulling 89 amps . The next day it popped up again and we replaced the alternator. Upon replacing this there was oil everywhere! and we don’t know where it is coming from . Now shift into part light comes on !.

When putting my vehicle in park and pressing the button to shut off my car, a warning appears on the dashboard saying “warning: put vehicle in park. ” & it is in park. I have to wiggle the gear shifter in order for the warning to go away and if it won’t go away, then my car won’t turn off. There was a recall on it in 2018 & I need mine fixed. Somehow, my vehicle was not apart of the recall but it needs to be. [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

With the "shift to park" function, where the vehicle displayed the message even when it is in park, preventing the me from turning off the ignition.

Car gives “shift to park error” around every 5th time I turn it off. I have to turn the car back on and repark it to be able to actually turn off.

1. What component or system failed or malfunctioned, and is it available for inspection upon request? the issue was with the gear select switch and jumper harness, related to the "shift to park" malfunction in my 2019 GMC Acadia. Yes, the components were available at the time of the repair with the GMC dealer. 2. How was your safety or the safety of others put at risk? the vehicle would not recognize when it was in "park," which prevented it from being turned off. This could lead to unexpected vehicle movement or battery drain, and creates a safety risk if the driver assumes the vehicle is secure when it is not. It also poses a hazard if the vehicle cannot be safely shut down in an emergency or in unsafe conditions. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? yes, the issue was reproduced and confirmed by a GMC dealer during an appointment on July 22, 2025. They diagnosed the problem and verified that the gear select switch and jumper harness needed replacement. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? the vehicle was inspected and repaired by an authorized GMC dealer. 5. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? no, a "shift to park" warning message appeared and the vehicle would not allow me to turn it off without shifting in and out of park multiple times. This first occurred on July 18, 2025, and continued until the repair was made.

Since buying my 2019 GMC Acadia multiple times a day my auto shift to park will not allow me to lock my door as normal. It says there is no recall associated with my VIN number however my particular year, make and model has the same issue. Please make this make since.

Around 7k miles on the vechicle, driving down the road it kept coming to a stop and skipping. Pulled into the parking lot the best that I could and put it into park. After it wouldn't shift into anything. Never gave any dash signals. It is currently in the shop getting a whole new transmission.

When vehicle is placed in park, it is still showing a "shift to park" message once car is turned off.

I get a warning whenever the car is placed on park with the shifter telling me to shift to park even though it’s already on park. This causes the car to not be able to turn off.

Shift to park issue. This 2019 Acadia denali has been serviced twice for a shift to park issue:(it’s a known problem that occurs when Acadia vehicles fail to recognize that the gear shifter is in the park position). The first time was under warranty in 2022 and it has just been serviced again for the same problem. The system is the same as the older gm recall for this problem and the recall should also include this model as well but unfortunately it does not.

The vacuum pump on my 2021 GMC Acadia failed causing my breaks malfunction. This problem was confirmed by a certified mechanic that repaired it. This is in conjunction with the NHTSA recall issued under n192268490.

On my 2019 Acadia, the message shift to park keeps appearing on my dash when I shirt the car into parked. It's getting more frequent and when I called GMC it's a well known problem to where the lady taking my appointment says yes we are aware it's happening alot. They want to charge 800 to fix a problem that should be a recall. It's a well known problem and there has been cases and suits brought up and GMC will not make a recall on this even though the mechanic said I can't believe this hasn't been recalled. Can you help with making GMC do a recall in the shift to park. Thank you.

Whenever parking the car and trying to stop (shut off) the engine it will randomly say “shift to park” and I cannot shut the vehicle off.

Faulty shifter assembly (shift to park) car stays on while in park because of this issue.

We receive a shift to park message when we try to turn our 2019 GMC Acadia off. The vehicle is already in park, but an alarm bell keeps going off telling us it is not. The vehicle will not allow us to shut off the vehicle properly and results in battery drain and inability to lock the vehicle. We have noticed there is a class action lawsuit and recalls from previous year's models and the 2019 model manufactured in ohio, but ours was manufactured in tennessee. Our year, make, and model isn't listed in the class action lawsuit and/or a recall. This is very frustrating considering the number of similar issues/complaints in regards to this shift to park problem. I feel GMC as the manufacturer should be held liable for a faulty part and they have failed to correct this issue in later models since they were aware of the issue with the 2017-2018 Acadia models built in tennessee.