2019 GMC ACADIA Complaints

Thermostat is repeatedly going bad. Throws Steering Assist reduced. Had it replaced twice and it’s bad again.

I bought a car about 2 months ago and they did not tell me the thermostat was bad and they won’t cover it.

When parking the vehicle the electrical system will put a warning on the dash indicating you are not in park. A message indicates shift to park. The car will not shut off and you cannot lock the vehicle. This happened when I first bought the vehicle and it was under warranty and repaired. It is now happening a second time in 2025.

The Shift to Park is not recognizing when my car is in park and continues to ding and won’t let me turn my car off.

I purchased a used 2019 GMC Acadia from Grieco Honda around November 20, 2023. They showed me a CarFax report indicating the vehicle had never been in an accident. Immediately after the purchase, I reported several issues and attempted to return the car under their 30-day warranty. However, the salesperson convinced me not to return it, assuring me that they would address all of the problems. From the beginning, I complained that the car shook violently when driving between 45–60 mph, especially during acceleration. The vehicle took an unusually long time to heat up, and the brakes were loud and squeaky. A few months later, after driving over a large speed bump, the airbag warning light turned on. During my next oil change, I mentioned this issue, along with a problem with the window sensor. They dismissed my concerns and told me to take the car to GMC across the street because they lacked the tools to diagnose it. At GMC Hurd, I was told the diagnostic service would cost $160 and that I would need to leave the vehicle for the day. At the time, I couldn’t leave the car because I needed it to pick up my children. Now, in November 2025, my inspection is due. I brought the car back to GMC, and they informed me that the vehicle had been in a major accident prior to my ownership. They discovered that the airbags had previously deployed and were stuffed back into the driver’s seat and sewn shut. I have never been in an accident with this car. I reported this to Grieco since they were the ones who inspected the vehicle in November 2023 and passed it. I believe they managed to get the car through inspection without properly or thoroughly examining it before selling it to me. They have dismissed my concerns and told me there is nothing they can do. This is outrageous, as the airbags would not have deployed in an emergency, putting my safety at serious risk.

When DRIVING the center console screen begins to glitch. It will begin to move around and try to connect to the internet, begin to track navigation, connect to my phone and make calls, or it will just started moving back and forth from the different screens. It also makes sounds while it is glitching. It's incredibly distracting when I am trying to drive. There are a number of online forums that have identified the problem in their same year, make, and model of vehicle. There were no warnings or messages prior to the problem. It presented itself about a year ago and I have just been resetting the battery as a temporary solution.

The contact owns a 2019 GMC Acadia. The contact stated that while driving at an undisclosed speed, the message "Steering Assist Fault - Drive with Caution" was displayed. The vehicle was taken to an independent mechanic, who retrieved DTC: P0128 (Engine Coolant Temperature Below Thermostat Regulating Temperature) and replaced the engine coolant thermostat. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was 55,114.

The vehicle will be in park, and a message will pop up saying "shift to Park check and advise". Took my car into the dealer shop to get this fixed their response was the cause of the condition may be that the park switch in the transmission control (shifter) assembly is not pulling the BCM signal low to electronically show that the vehicle is in the park position.

The contact owns a 2019 GMC Acadia. The contact stated that upon attempting to turn off the vehicle, the vehicle failed to register that the transmission was in park(P) and the vehicle failed to turn off. The contact stated that the vehicle continued to beep. The "Shift to Park" message was displayed. The contact stated that the vehicle required to be turned off and restarted several times, or to be driven to shift to park(P) successfully. Upon investigation the failure, the contact linked the failure to GM Technical Service Bulletins: 18-NA-297 and 19-NA-206. The vehicle was taken to the local dealer, where it was diagnosed with a faulty shift control, and the dealer determined that the shift assembly needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 52,280.

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.