2019 GMC Acadia

Last week, the coolant gauge , on our 2019 GMC Acadia, was reading below "C".... The "Steering Assist" warning was disabled on the on-screen display and the Air conditioning stopped working. Took the car to a mechanic, who read the codes.... Mechanic stated that all symptoms were based on a defective GM thermostat. The thermostat was "stuck-open" causing the "steering assist" to be disabled as well as the A/C from being disabled as well. It seems GM has updated the part since when the series of Acadia were manufactured. After getting it repaired, at of our pockets, we researched and noticed that thousands of other GM Acadia owners had the same exact 3 symptoms: (1) malfunctioning coolant reading (2) "Steering assist" disabled (3) a defective ("stuck-open") thermostat..... Symptoms were exactly the same for all parties involved. We have owned many vehicles never had a thermostat fail before 65k Miles.... It became a safety issue since the car disables the "steering assist" based on the thermostat being stuck open. Contacted GM corporate which stated unless a recall, there would be no compensation. GM needs to make it right for the thousands of GM owners whose car has the 3.6L engine In short, this is a major issue since the car's steering system is NOT working correctly We would like a recall to be initiated. Thank you.

About a month ago when I shifted my vehicle into park and shut the vehicle off, "Shift to Park" appeared on dash display for which I had to restart the vehicle, shift it into another gear and attempt to shutoff the vehicle again. Occasionally this would work but not all the time. Other times when shifting into other gears did not work I had to restart the vehicle, press the shifter button multiple times and then was able to shut the car off with no "Shift to Park" appearing. On 7/11/25, Arrived to work and had to performed the shifting the vehicle into another gear and was able to shut the vehicle off. When I went to leave for lunch, the car would not start at all, check the GM App and it stated "Critically Low Battery". A co-worker helped jump the battery and I was able to start the vehicle. When I went to leave work for the day, the vehicle would not start again with no notification as to why. My co-worker jumped the battery again and vehicle started now with all the system lights on dash staying on and warnings displayed. 7/12/25 Vehicle struggled to start and all system lights were still on. Later in the day, the vehicle would not start and all overhead, dash, display, taillights would not shut off. We jumped the battery and took the vehicle to our local dealer.

Im a travel nurse and I was working in Vermont. As I was driving on the highway in New York on my way back home a shift to park light came on, a stabilitrak light came on, power steering light came on, ABS light came on, and my check engine light also came on. My vehicle started slowing down as I was driving and my lights on my dashboard were turning on and off and my speedometer was not working. I was able to pull to the side off the highway so I could get out of harms way. I made a call to OnStar for help and they asked to if I made it to a safe location. As the car was still on I was able to take the next exit and ended up in an auto zone parking lot. As I made it in the parking lot I turned the vehicle off but only the engine turned off but everything else stayed on and the shift to park light kept coming on when the vehicle was in park. I was in the parking lot for 3-4 hours freezing in my vehicle until onstar came to tow my vehicle. By the time onstar came my battery in my car had drained and it was a new battery. I was told that I would have to contact auto transport to transport my vehicle to Louisiana at the dealership where the vehicle was purchased. I paid $1600 to transport my vehicle back home and I had to find a way to make it back to Louisiana. I didn’t have a credit card so a friend of mine was able to rent me a vehicle to get home and I paid a total of $1700 on a rental because the dealership in Louisiana couldn’t give me a time or date the vehicle would have been finished. I have been to the dealership 3 times now for the same problem in less than a week. I have paid $1500 altogether to fix damages on my car that I noticed other vehicles with the same make and model had the same issues. I never had a problem with my vehicle before everything just started happening all at once. I’m currently having to pay for car rentals to get to and from work and to make sure my kids get back and forth to school. My vehicle in at the dealership again for the 3rd t

Last week I parked in a large public parking lot and attempted to turn my car off. I received a notification in my dash to “shift to park” even though my car was already in park. I was unable to turn the car off or lock the doors. I ended up having to leave. I have now gotten this message six times in the past week. It can take up to twenty minutes to get the car to turn off so I can exit. Yesterday upon returning to the car I showed an error message as soon as I started it that the parking brake needed service, stabilitrak is disabled and steering assist is disabled- drive with care. As I tried to exit the parking lot, I found it almost impossible to turn the steering week. I pulled over and restarted the car, releasing the steering wheel so I could get home. This morning, all of the service lights were on and periodic warnings flashed on my dash throughout my drive to work. I contacted the dealership and was told that there is a recall for this exact issue on the 2015-2018 models of my car. I have a 2019. This is certainly a dangerous issue that should be proactively fixed and is clearly still present in years that are not being included in the recall. I was told my car was one month past its warranty and told I could pay 250$ for the issue to be assessed and then they could quote me on a fix. The dealership acknowledged that this is an issue they regularly fix.

When attempting to park vehicle, the alert "Shift to Park" populates and the car will not completely shut down. This happens sporadically and can take up to 15 minutes to get vehicle in the right position to completely park and shut off. If it's not in the proper park position, the car can continue running, battery drainage and possible roll out of place. This also causes issues with the transmission not shutting off. I have not had this particular vehicle inspected, but contact with dealer service departments confirms continued complaints of this issue and it has not been addressed by GMC/General Motors. Problem has been occurring at various times over last 3 years.

After noticing my AC was not cooling, I began receiving a “steering assist is reduced drive with care” notice every time my car was started. My car is more difficult to steer. It has been assessed by a certified mechanic and found that the coolant temperature probe is malfunctioning and the ECM will either need to be fixed or replaced. Due to malfunctioning power steering, I do not feel safe driving this vehicle until it is fixed.

The contact owns a 2019 GMC Acadia. The contact stated while driving 55 MPH, the electric power steering (EPS) warning light illuminated, displaying the message "Steering assist Might be Inoperable". The contact stated that following the message being displayed, the vehicle overheated. After restarting the vehicle, the vehicle returned to normal functionality, but the failure had since become a regular occurrence. The vehicle was taken to the dealer, who diagnosed a failure with the thermostat. The vehicle was repaired. The manufacturer was notified of the failure but referred the contact to the NHTSA Hotline for assistance. The failure mileage was 70,000

The contact owns a 2019 GMC Acadia. The contact stated that while attempting to shift to park(P), the transmission failed to shift into park, and the contact was unable to turn off the vehicle. The contact also stated that when she started the vehicle, the reduced steering power warning light illuminated, and the failure caused the battery to be replaced once. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 97,000.