2019 GMC Acadia electrical problems

Filed Oct 22, 2026 · Electrical · IL

When putting the vehicle in park to turn it off, the dash indicates that I need to put the vehicle in park. But it is in park and it will not let me shut off the vehicle.

Filed Sep 19, 2026 · Electrical, Transmission · VA

While attempting to turn vehicle off, the message shift to park was given. Could not shut vehicle off! Has happened multiple times in the past, then disappears for awhile. Comes back again at will. Have seen multiple complaints on this issue falling back to a defective micro-switch within the shifter assym. Former GM tech here---

Filed Aug 12, 2026 · Electrical, Engine · PA

See attached file

Filed Jul 8, 2026 · Electrical · OH · fire

Fire Started in Center Console

Filed Jun 27, 2026 · Electrical · PA

Shortly after purchasing my 2019 GMC Acadia with 52,000 miles on it, my wife parked the vehicle in our driveway and shifted the transmission into Park. When she pressed the push button to shut the vehicle off, the instrument cluster displayed a "Shift to Park" message even though the shifter was already in the Park position. Because the vehicle did not recognize that it was in Park, it would not shut off completely. The radio remained on, and the doors could not be locked. The only way to get the vehicle to shut off was to repeatedly shift from Drive to Park until it finally recognized Park. This occurred multiple times. After researching the problem, I discovered that many other GM owners have experienced the same "Shift to Park" failure. I believe this is a widespread defect that should be investigated because it can prevent a vehicle from shutting off properly, leave electrical accessories powered on, drain the battery, and prevent the vehicle from being secured when parked.

Filed Jun 26, 2026 · Electrical, Transmission · ME

Problem 1: I got the car 2 years ago, and it keeps telling me to "Shift to Park" even though its in park. That's been happening for the whole time I've had it. It does throw a code for it on the scanner machine. I have to shift it back and forth sometimes 3 times and sometimes 17 times. It just keeps beeping over and over and won't shut off. I am having a mechanic look at it Tuesday but hoping it doesn't cost a lot. But no recalls on my car. Problem 2: For the last 4 months or so it keeps saying steering assist is reduced drive with car. It's being looked at Tuesday as well. I have 109K on my car, and got it at 86K.

Filed Jun 7, 2026 · Driver assistance, Electrical · KY

Thermostat in these are all bad and everyone keeps having problems with them. Also forward collision warning and steering stability warning come on. Thermostat needs to have recall. Everyone is having the same problems.

Filed May 15, 2026 · Electrical, Engine · 48,500 miles · CT

The contact owns a 2019 GMC Acadia. The contact stated that while driving at an undisclosed speed, a “Steering Assist is Reduced ” warning message unexpectedly displayed. The contact also stated that the thermostat became inoperable. Additionally, the thermostat information was no longer displayed on the instrument panel. The vehicle was taken to the dealer, where it was diagnosed that the thermostat had 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 federal safety agency Hotline for further assistance. The failure mileage was approximately 48,500.

Filed Apr 24, 2026 · Electrical · WI

This vehicle has an electrical deficiency when trying to park, The console will NOT recognize that the vehicle is in park, causing bell warnings, beeping, and an INABILITY to lock the vehicle, thus draining the battery. We cannot walk away from it, nor ever leave anything of value in it. This is a recurring problem, causing stress, and having to start, shut off, re-start, wiggling the shifter knob, MANY times and HOPE that the electrical system will recognize that the vehicle IS in Park. sometimes this can take 20 minutes, IF it works at all. If not, We have to leave someone IN the vehicle when this happens, in order to do anything! This is a KNOWN problem with this shifter, and there SHOULD be a recall on it!

Filed Apr 15, 2026 · Electrical · TX

Ongoing problem with only solution is a recall notice. Power Steering Assist Reduced -Customer reports Power Steering Assist Reduced message displayed on DIC, A/C is inoperative, Engine Coolant Temperature Sensor inoperative. Recall needed to update Engine Control Module (ECM) with latest calibration.