Equipment Problems of GMC Acadia - part 1

While driving my 2025 GMC Acadia, the vehicle experienced a sudden and severe failure of the brake master cylinder assembly, causing a significant loss of hydraulic pressure and braking assistance. Multiple dashboard warnings illuminated simultaneously, including abs and brake system alerts. The brake pedal feel altered abruptly, drastically increasing the required stopping distance and creating an immediate collision hazard. The vehicle is currently grounded at a certified gm dealership awaiting a total replacement of the defective master cylinder assembly under factory warranty. Mileage at the time of failure was 19,000.

See all problems of the 2025 GMC Acadia 🔎.

Urgent code going off due to thermostat not being red gauge is stuck.

See all problems of the 2018 GMC Acadia 🔎.

I’m getting a shift to park on my dash after it’s already in park. This causes the break to get stuck when driving.

Vehicle continued to have shift to park message when car was already in park. This is a known issue in some other GMC vehicles. Safety issue that the battery could drain or the car could roll unexpectedly. This message repeatedly displayed on the vehicle. The dealer confirmed the problem and performed the repair. Repair order number is xxx for $549. 17 on xxx at boucher Buick GMC of waukesha [xxx]. While there isn't a recall on file for this specific VIN number, I believe it should be included in the recall and I am requesting reimbursement. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2019 GMC Acadia 🔎.

Received a power steering reduced notice when starting the car, noticed shortly after driving the temperature gauge had not moved from its resting position. A few trips later it still had not moved and the check engine light came on. Mechanic looked at it said it may be a sensor quoted $1k to fix. A few days later it randomly started working and the light went off so I did not have it fixed. About 4 months later the same code displayed on the dash with the same issues. This time I noticed the ac would not work either it only blew out hot air. Also the fan under the hood turns on as soon as the car is started. Been about 3 days and it started working again out of nowhere.

See all problems of the 2020 GMC Acadia 🔎.

The rear stationary/fixed sunroof glass spontaneously shattered while I was driving. I heard a loud pop, after I parked I checked the car to see what happened and found a shattered sunroof. There was no impact or known object that struck the glass.

See all problems of the 2023 GMC Acadia 🔎.

Sunroof shattered driving on the interstate. Never saw a rock or anything. I think it shattered due to pressure and temperature changes.

See all problems of the 2013 GMC Acadia 🔎.

Shifter micro-switch is not working and is available for inspection upon request. Vehicle is not shutting off as it is indicating shift to park. The vehicle unable to shut off can cause issues while parked in the garage still running and worried about causing a fire. Problem diagnosed by private individual but have plans on taking it to dealership. The shift to park indicator issue has been occurring for almost a year and has progressively gotten worse. I have noticed other vehicles with the same make/model/year have had similar issues with known defects that a recall was issued.

Hello so I notice 3 weeks ago my headlights keep cutting off and on then a week later my radio stopped working, the floor of the driver side is always wet after it rains. I noticed one day the rain started dripping on my feet when I drive after a big rain fall, I believe the car is not sealed properly and now water is coming out from the airbag signs in my vehicle and the car starting to smell like mildew. I think water is sitting in certain parts of my vehicle. I'm not sure what to do.

See all problems of the 2012 GMC Acadia 🔎.

I purchased vehicle used 2 years ago last year. I noticed the air conditioner was not cooling. I summed it up too, and extremely hot summer. This summer I did the same thing. I took it in immediately. Catastrophic, I think I bought it like this. It fell apart, the air conditioning compressor fell apart. There is like shrapnel through everything, and they have to go through and clean everything out. It's gonna cost me over two grand. But it only be in 40000 miles on it. I understand it's a twenty nineteen, but owner said at forty thousand miles. This should never happen.

?? p0128 code, thermostat-related symptoms, steering assist reduced warnings, increased steering effort, or other safety concerns while driving.

See all problems of the 2017 GMC Acadia 🔎.

My shift to park senor come on often and wouldn't let me turn the vehicle off.

I am submitting this complaint to request that NHTSA investigate a potential safety defect involving the engine coolant temperature monitoring system, thermostat/engine coolant temperature sensor system, and its relationship to reduced steering assist in 2019 GMC Acadia vehicles. My 2019 GMC Acadia, currently at approximately 61,500 miles, has experienced the following symptoms: • the engine temperature gauge remains flat or reads abnormally low/cold. • the cooling fans run continuously at extremely high speed, creating a loud "screaming" fan noise. • the vehicle displays the warning message "steering assist is reduced — drive with care. " • the vehicle has a history of diagnostic trouble code p0128, "engine coolant temperature below thermostat regulating temperature. " I am concerned that these symptoms are related and represent a potential safety defect rather than an isolated thermostat or cooling-system repair. Gm has issued bulletin pit5967, "service steering message with p0128," which applies to GMC Acadia vehicles from model years 2017 through 2023. The bulletin states that when p0128 is present, the ecm may be reading coolant temperature incorrectly and that a "service steering message" may be displayed to protect the steering gear in the event of an undetected overheating condition. Gm instructs technicians to diagnose and repair p0128 first. Gm bulletin 17-na-158 also describes a relationship between p0128, an invalid coolant-temperature signal, and the "steering assist reduced, drive with care" warning. The bulletin explains that the steering module relies on valid coolant-temperature information to provide additional steering assistance under cold conditions. When the coolant-temperature signal becomes invalid, this function can become inoperative, potentially resulting in a heavier-than-normal steering feel.

While driving the temperature gauge drops from normal to cold , the dash displays " steering assist reduced" and the fan is very loud . My mechanic said the thermostat and or sensor needs to be replaced . When he resets with the reader its good for about a week and temperature gauge is normal. After seven days it repeats I only have 40,000 miles on the vehicle and its a 1,400 dollar job. I believe this should be a recall because I have seen a lot of the same complaints in this forum and what about the people who have the same problem but don't complain ?.

The camera system has failed. The screen is black and there is an exclamation point and a camera on the screen.

See all problems of the 2021 GMC Acadia 🔎.

I am getting the 'shift to park' error message when I put the vehicle in park. When I looked up the error this is what I got. . . But I don't see a recall for my vehicle. The "shift to park" message in GMC Acadias (2017–2019, primarily) is a common, known issue caused by a faulty microswitch in the shifter assembly that fails to recognize when the car is in park. This defect prevents the engine from shutting off, drains the battery, and requires a replacement of the shifter switch or assembly.

When I put the car in park and shut off the vehicle, I am getting a shift to park message with an audible sound. The car is in park already. Happens every time almost. It’s not showing up as a recall under my VIN. Just got the car. I have seen more recall issues on google and am concerned those will also occur which are more serious and aren’t listed either.

When the car was parked and turned off, I received a notice to "shift to park" even though the car was in park.

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.

Engine has a noise (chirp) when vehicle delivered. Found out after purchase that a known problem was present in the engine compartment that engineering has been unable to identify. Bulletin #pip6045b (oct20,2025) document id:7006702 with the engine failures general motors have had I have concerned about operating. A failure could result in danger to the occupants.

I got into my car to leave, I placed my phone on the wireless charging pad. When I got to my location about 10 minutes later, I grabbed my phone and went to put the wrist band attached to my phone around my wrist. The wrist band is a metal chain and it burned me on the side of my wrist and top of hand. I took the wrist band off as fast as I could, then touched it with my fingers to make sure that is where the sting was coming form, and it was. The passenger in the car also confirmed that the wrist band was dangerously hot. I took pictures of the burn marks it left on my wrist and hand.

2109 Acadia. The gear shift would not register as being in park when it actually was in park. This created an issue of the interior lights and radio not being turned off when the driver door was opened, posing the possibility of the battery being drained and the driver stranded. Upon searching, it was learned many Acadias have had this issue, including a friends'. This was reported to GMC executive resolution team and that it cost us $341. 38 to get it repaired. They refused reimbursement and have not issued a recall even though many Acadias are involved in this problem.

My car will not shut off when shifted into park. I get a shift into park message.

Hello. I got a recall and fixed in July 2021 for blind spot sensors/modules on my 2016 GMC Acadia slt. Now 3. 5 years later im having the same issue with these sensors that are located in the rear bumper of the car, they get water damage, corrosion, and then fail. A very poor design. And seems like the recall didn't fixed the issue either. This must to be a common issue for this car, lots of complaints online even after the recall. And the car dealership wont cover it because it was already fixed at that time and my warranty on my car expired not to long ago. They said it would be about $2000 to fix. I feel like this prematurely failed and it was recalled once for the same issue but now failed again is crazy after 3. 5 years. This shouldn't be a on going thing especially after a recall. I shouldn't have to pay for this outta my own pocket for a flawed design and would like my repairs for this to be covered again. Please help. Attached is a invoice from July of 2021 recall that was repaired. I only got a verbal estimate from the dealership (text messages) which I do have. Saying that it would be a $2000 fix this time. I didn't go through with it because I feel like it should be covered. Attached pictures of sensor/module in rear bumper that is corroded. Lights on both side mirrors will come on and stay on. Won't shut off. Messages on dash saying "service side dectection system". Blind zone setting won't shut off.

See all problems of the 2016 GMC Acadia 🔎.

While backing out of a parking place my husband noticed he couldn't stop the 2025 Acadia and almost hit restraunt behind us, while pusing on the break. He then started to go forward and kept saying "I can't stop it, it won't stop, I'm pushing on the break. " the vehicle then went forward and couldn't stop even pushing on the break. I tried pusing the button to turn off the 2025 Acadia a couple times (possible turning back on and because he foot was on the break restarted the vehicle) and then pushed park to see if that would stop. We hit the building in front of us and stopped. The air bags did not deploy so not going that fast. I pushed the button for 911 and they came on to assist and call police and asked if everyone was all right and other questions. Lucky no on was hurt and thank god for that. Tow truck was called and taken to local tow yard.

Vehicle would not run due to a failed fuel pump control module. With a non-running engine, the transmission could not be placed into neutral to be able to movie vehicle out of the road. Needed tow truck to move vehicle. This condition placed many people at risk as the vehicle could not be moved out of the way until a tow truck arrived.

Unknown.

See all problems of the 2014 GMC Acadia 🔎.

Park to shift issue - the vehicle did not register that I was in park, jerked hard when trying to place in gear, did not register the proper gear (reverse, neutral, drive), would not unlock doors to let passengers out even if it were an emergency. Seems to be triggered on inclines but have also been having issues on flat ground. Other Acadia's apparently have a recall for this issue but my VIN does not register as recalled which is not acceptable. . Read more...

The shift to park. It does not want to stay in park. I feel that if it does not stay in park, the vehicle could roll forward or backwards. Yes, it was looked at by an independent service center, and they thought it was on a recall. This is a 2016 GMC arcadia and the 2017 model and newer have this problem and were on recall. No one else has looked at it. I do not drive the vehicle that often, so it does not have many miles on it. I took it out a few weeks ago and I noticed it.

The shift to park keeps showing up and I had this issue taken care of last year at the dealership and it just started again. It is over $600 to have the repair done and should last more than a year before it needs to be replaced again. The lane assist pops up every couple weeks that it is not working.

While idling, my vehicle has a strong exhaust smell inside the cabin. Per the gm dealer, this is due to faulty flex hose.

Vehicle warning light, and noise alerts when placing in park. Vehicle does not register parked. Vehicle has to be restarted several times and shifter moved in and out of park until registers as parked. When viewed by mechanic, it was stated there has been a recall to contact manufacturer about recall, but none noted on site.

I bought the car at the end of October 2025, so it was always cold till last month. Last month the first day it’s warm I get a warning saying my steering assist has been limited with a code saying the thermostat needs replacing as well as the sensor. This is a known issue with these vehicles and now I have to pay $1500 out of pocket to have fixed because my limited warranty expired 2 weeks before it was warm enough to trip the codes. This is ridiculous especially seeing as I am disabled and can’t afford an extra $1500 after spending $7000 for the down payment!.

The engine temperature gauge was reading cold when driving for 40 minutes and the fan was running on high. Also said steering assist reduced. Brought it in and had to replace the thermostat, because of the code they received. That fixed the issue.

For the past 4 months after turning off the engine, my vehicle is failing to recognize that it is in park. I am getting a message on my display stating “shift to park”. This is preventing my vehicle from shutting down.