2020 GMC ACADIA Unknown Or Other Problems

I own a 2020 GMC Acadia that has experienced multiple major mechanical failures within one year. In January 2025, at around 74,000 miles, the transmission failed completely with no warning or clear indication of what was wrong. The vehicle suddenly lost power while driving, creating a safety risk for me and my child. I was quoted around $12,000 for the transmission replacement initially before getting GM involved. GM covered all but approximately $3,600 out of pocket for me and also covered 100% of the timing cover replacement, which was found to be defective during the same repair. Now, at about 84,000 miles, the thermostat has failed, triggering the check engine light. This repair has not yet been completed and is estimated at around $1,500. My dealership informed me they keep thermostat parts in stock because this failure is so common on Acadias. There were no warning lamps or symptoms before any of these failures occurred. All repairs and diagnostics—including the current issue—were done at the same GMC dealership where I’ve always had my vehicle serviced on time. I’ve been a loyal customer and maintain my vehicle according to the recommended schedule. Despite that, I have faced repeated high-cost repairs on a 5-year-old vehicle with relatively low mileage, which has been financially and emotionally overwhelming—especially as a parent who recently lost employment. Having the transmission, timing cover, and now thermostat all fail in such a short time clearly raises concerns about the reliability, safety, and manufacturing quality of the 2020 GMC Acadia’s powertrain and engine systems. Given that GM has already covered most of the transmission and timing cover repairs and dealerships acknowledge frequent thermostat failures, this appears to be a systemic defect that warrants formal investigation.

Heater Core broken

While i was driving a code came on my dashboard that read "Steering assist is reduced drive with care". Soon after my check engine light came on. I pulled over not knowing what was happening. I took it to the garage to have it looked at and the mechanic stated that there are over 1000 gmc customers with this same issue and that the thermostat is stuck open. Which may cause major malfunction or even blow the engine. I looked up recalls for my vehicle and there are none but gmc issued a recall on other vehicles for this same issue. How do I get help here?

When it rains(or car wash) my power locks don't work. I get locked out of my car. My car reset itself in the middle of an intersection(like I turned it off and back on again). One of my gauges is always not working. The sunroof doesn't work right. Water is getting in the electrical area somehow. I've taken it to two chevrolet dealerships, but no help.

Rear-View Camera Failure: The rear view camera functions intermittently. While in Reverse, the screen goes black, with a red triangle and a circle with a line through it. This SAFETY ISSUE increases risk of incidents resulting in injury and/or property damage while the vehicle is in reverse. I understand there already exists a NHTSA RECALL (NHTSA Campaign Number: 22V709000) however, it states that only vehicles equipped with the optional Surround Vision feature are affected. My vehicle does not have the 360 Surround Vision (RPO UV2). but is experiencing the same SAFETY ISSUE!

Rearview camera is intermittently non-functional when placed in reverse gear, and shows a red triangle and red camera icon on the screen along with a circle and slash through it. See attached photo.

GMC safety recall was issued in Sept. 2022. (N222378380) My backup camera (2020 GMC Acadia) has been going in and mostly out since Jan. 2021. GMC has yet to find a fix for this issue, about 4 months since the recall but almost a year and a half for my car. I have had it in for service 3-4 times and thy can't fix it. It is a safety issue as we depend heavily on the camera to back up and the front camera to avoid hitting objects. We have had a few close calls but no damage, YET. I have had numerous conversations with GMC and my dealer. I keep getting the same answers. They can't (parts, no know fix, whatever) and won't do anything to fix the problem. I have been without this highly priced option for almost 2 years. Someone needs to get their act together. this is too long of a time to have this problem still exist..

Center console display does not start when you start vehicle. Stays blank! This happens occasionally. Sometimes restarting will fix, other times not. There is no rear view camera when this happens. Not sure what else is affected, such as backup warnings.

SQUEAKING NOISE FROM THE FRONT END DRIVER SIDE JUST APPEARED WHILE DRIVING. DRIVER SEATBELT WILL NOT LATCH ON THE FIRST COUPLE OF TRIES.

Mileage: 1,600

PURCHASED NEW 2020 GMC ACADIA DENALI IN DEC 2019. VEHICLE WAS EQUIPPED WITH SEVERAL DEALER ACCESSORIES INCLUDE ROOF RAIL CROSS-BEAMS. THESE WERE NOT IN STOCK AT TIME OF PURCHASE AND RETURNED AFTER 1 WEEK TO INSTALL. AFTER PICKING UP THE VEHICLE ON MY DRIVE HOME, I HEARD A WHISTLING/HUMMING NOISE COMING FROM THE EXTERIOR AT ABOUT 30 MPH. AS I ENTERED THE HIGHWAY AND TRAVELING AT 65 MPH, THE NOISE WAS DEAFENING AND THE VEHICLE DID NOT HANDLE VERY WELL, VIBRATION IN THE STEERING. I IMMEDIATELY RETURNED TO THE DEALER AND DETERMINED THE NOISE WAS FROM THE ROOF RAIL CROSS-BEAMS. SERVICE TEAM THAT THERE COULD BE SOME NOISE BUT IT WOULD NOT AFFECT THE VEHICLE HANDLING. I HAD THEM REMOVED AND THE DRIVE HOME HAD NO ISSUES. BUYER BEWARE IF YOU ARE ONLY GETTING THE CROSS-BEAMS AS AN ADDED ACCESSORY AND WILL NOT UTILIZE TO CARRY ANY ITEMS, IE; KAYAK, BIKES, ETC.

Mileage: 35