The transmission was failing to shift and jerking me forward in the vehicle. The check engine light came on. I was on the highway going at high speeds. Also, my vehicles Internet connection dropped. I pulled off the highway and turned off my vehicle. While starting my vehicle again and attempting to go into reverse, it would not reverse and it would not drive forward. It would just rev the RPMs. My vehicle has been sitting at the dealer for two weeks. They have not looked at it yet. The police were not called as there was not an accident, thankfully. The warning light came on as the vehicle was failing.

- Nebraska City, NE, USA

Shift to park error notice comes up on dash when car it turned off and in park. Car is clearly in park, but error code -??shift to park-?? appears on screen. Beeping occurs until car is turned off and shifted to R or D and then shifted back to park and turned off. This error happens several times a week, including twice today 6/22/24. I have to restart my vehicle and shift it to R or D then back to park SEVERAL times before the error is cleared.

- Sterrett, AL, USA

GM has acknowledged that there is a "Shift to Park" problem with 2017 and 2018 GMC Acadia's. This design flaw/ part failure does not recognize that the vehicle is actually in "Park" so you cannot shut off the engine. In addition, the dash lights remain on which eventually drains the battery. Sometimes the car will roll as if it's in Neutral. GM is very aware of this problem. However, they do not have a permanent solution. GM should be required to issue a nationwide recall to correct the situation by totally disabling the electronic part. In six years of ownership, I've encountered this problem 3 times: 5-14-19, mileage 13,266, 1-27-21, mileage 29,381and most recently 5-30-24, mileage 65,057. This 3rd repair cost me $721.88.

- Stow, OH, USA

Shift to park warning when I-??m in park when I turn off vehicle

- Dayton, KY, USA

We purchased this vehicle New in 2018. Gear Shift Problem. The vehicle displays a persistent -??Shift to Park-?? warning on the dashboard. This usually occurs even when the gear selector is in the -??Park-?? position and I have difficulty in Turning Off the Vehicle. The ignition remains active despite the gear selector being in -??Park.-?? We have to go through all the gears - Drive - Neutral then Park then try to turn it off over and over. May take 5 or 6 tries before I can leave the car safely. Unintended Vehicle Movement: We believe the car is safely in the -??Park-?? position and have exited the car and then it rolled. We have to jump back in and try to turn it off. I'm [XXX] and husband [XXX] and this is causing us injuries. It rolled one time and hit the Handicap Parking Sign in my parking space. It just missed hitting another car in a parking lot when it rolled about 3 times now. Called around to get it fixed but everyone says "it's been a problem for years and GMC has NO fix for it." Only temporary fix is to install new gear shifter or full transmission replacement, which owner has to pay for $700 to $3000 repair! We don't have 30,000 miles as of yet. We are low income, on Social Security and this should be a Recall since there are many complaints online for years. Praying we do not have a collision or terrible injuries. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Millsboro, DE, USA

Car does not recognize it is in park and has rolled into my garage door even though the shifter has been placed in the park position. Also it continues to alarm to "Shift to Park" and has caused 2 dead batteries.

- St. Clairsville, OH, USA

4 years ago I would get a shift to park error. This meant my vehicle did not recognize that it was in park. This meant that my vehicle would not lock, turn off the radio or headlights. My husband tried to fix it, but it turned out to be a part that only a dealership could obtain. So $500 later my vehicle was fixed. This was a KNOWN problem affecting multiple vehicles/years. Fast forward to the third week of February this year. I again am getting this same error. Took it to the dealership and there is a switch along with a transmission control harness and jumper harness that needed replaced. These parts have to do with the original shifter that was replaced 4 years ago, but of course not covered. So now $668 dollars later my vehicle is fixed. This is another KNOWN issue and my repair paper says -??replace per bulletin #19-NA-206. Now I am pissed. I want to know why these are not a recall. Both times were a HUGE SAFETY ISSUE. I could not lock my car for Pete-??s sake. If my car was stolen, what is the first question my insurance company is asking" It would be -?? WAS IT LOCKED?-?? Not to mention MY PERSONAL SAFETY. Anyone could get into my vehicle and wait for me or me and my grandchildren to get in the car. Does human trafficking ring any bells???? What is it that needs to be done to make this a damn recall"

- Cardington, OH, USA

Leaving work on [XXX], my vehicle started sounding like a loud truck and it started to smoke. I immediately pull over because something smell like it was burning. That's when I call my insurance company to assist me. So, I had it tow to the nearest Mechanic Shop. It was a scary movement for me being along at night. I'm very upset about this had happen to my GMC 2018 Acadia, the Cadillac Converter left is defect. It is not drivable. It's at the shop for least a month. The Mechanic Shop have not received the parts because GMC has a back order. This is to long being without transportation. This is unfair where I continue to pay the monthly bill. Please, I asking to investigate on this matter. I called the Pep Boy Mechanic Shop today and the manager said it still on BACK ORDER. What happen to GMC products? Hope to hear from someone soon! Thanks [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Guyton, GA, USA

The shift to park displays and will not allow the vehicle to shut off. This is the second time this has happened in this vehicle. I have 63822 miles and repaired this same issue about 20000 miles ago. Looked into it and it appeared to be a common issue in this year and model. Looking for some insight on what if anything can b me done.thank you

- Brookfield, CT, USA

Whining noise from rear axle when 4x4 engaged.

- Sidney, OH, USA

The vehicle will not shift into park. This is a common problem with this vehicle, many lawsuits. When you walk away one has concerns that the vehicle is actually in park or not.

- Grundy, VA, USA

Shift to park issue is getting worse. I couldn-??t turn my car off for hours today. The recall is still pending for this and GMC is doing nothing after thousands of class action lawsuits and complaints. Keeping my car running for hours on end while in park because it won-??t turn off is causing electrical issues and using tons of gas. I have to get with an attorney at this point because I can-??t use my car lots of the times because I can-??t leave it running and unlocked all day while I-??m at work or at the store. It-??s a MASSIVE safety issue. GMC needs to take accountability and fix these vehicles. This has been ongoing for 2 years now.

- Bartlett, TN, USA

When I put my car in Park and go to shut it down, it is not recognizing that it is in park, and will not shut down. I have to spend 30 plus minutes messing with the shifter to try to get it to recognize it is in park when it is indeed in park. I have to start and stop my car a number of times to do so. There have been a number of complaints for this over the years and NOTHING has been done with this. This can be a costly repair as I have seen results in a new transmission.

- Millport, NY, USA

The -??steering assist reduced. Drive with care-?? A/C turns off and fan kicks on high. Transmission temp flatlines. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Carson City, NV, USA

When putting my car in park and turn the car off. the car dashboard says to shift the car in park and beeps. I repeatedly turn the car on and off until the car reads it as being in park. or the car will not turn off completely, it will continue to beep, and it will not lock the doors. I have called a GMC dealer about this issue. There is no warning message except to put the parked car in park!

- Phenix City, AL, USA

Vehicle does not recognize that it's in park. Once parked a warning comes on telling you to shift to park. The vehicle does not completely shut off because it does not believe that it is in park.

- Delaware, OH, USA

The thermostat stops working and my a/c stops blowing cold air, and driving assist stops and engine light goes on. It is a rampant problem among GMC Acadias with no reason or fix. Please advise.

- Naples, FL, USA

The vehicle would intermittently display a "Shift to Park" message and sound alert chiming when moving shifter to park position. The car could not be parked until the chiming and message were dismissed by jiggling the shifter, sometimes after a prolonged battery-draining attempt to end the condition.

- College Station, TX, USA

When turning off engine it displays "shift to park" and won't shut off. This has been ongoing since I purchased vehicle but is much worse now

- Volant, PA, USA

Vehicle does not shut off when shift to park. Must put vehicle in gear then shift to park numerous times in order to get the vehicle shut off. Vehicle will not start. Requires numerous attempts applying brake to start

- St Paul, MN, USA