2023 GMC Acadia Powertrain & Transmission Problems

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.

The contact owns a 2023 GMC Acadia. The contact stated that while driving on the highway at an undisclosed speed, the vehicle stalled, and the engine lost automotive power. The vehicle was able to restart. During a second failure, the vehicle lost automotive power and stalled in the middle of the highway, and the vehicle was unable to restart. An alert message was sent by OnStar reporting a transmission or engine failure and advised that the vehicle needed immediate service. The vehicle was towed to the dealer where it was diagnosed with a fuel pump module failure. The manufacturer was not notified of the failure. The failure mileage was 24,749

My 2023 GMC Acadia consistently makes a sound at lower speeds when it is changing gears. For example, accelerating or accelerating for stoplights. The sound is kind of a ka clunk. The technician can find nothing and does hear the sound when we go for a test ride. I am worried that the sound indicates a transmission problem. The VIN search does not show a recall for my vehicle.

On 11/26/24 my wife was running errands in her vehicle when the power shut off and killed the car. She was in the left lane of a busy state highway. She was able to coast off the road slightly before the vehicle came to a complete stop. The dashboard said to press brake and start button, but the car would not start. The vehicle was also stuck in drive and would not switch to park, neutral, or any other gears. Police came and had to push her vehicle with theirs into a nearby park lot so a tow truck could pick it up. It is currently at a GM dealership waiting to be looked at.

We purchased a 2023 GMC Acadia AT4 new in October 2023. There is currently a little over 19,000 miles on the AT4. As of today November 13, 2024 the SUV has been to Blaise Alexanders, for at 3 times with same issues. Between the speeds of 50-65 there is a shudder, which in August 2024, the Chevy garage changed the fluid However, You can now feel this at any speed through out a trip. The SUV was return to the shop for increasingly worse shudder between 50-65 and a new issue of "hunting" between 25-35. There are times that the SUV does not want to propel forward (like the AT4 cannot get out of its own way) Also, when making a sharp right turn followed by an immediate left turn, onto uneven surface, the AT4 acts as though it is confused as to what gear it should be. The garage was then notified that I know have whining sound. At one point the garage had the AT4 for a week, the general manage drove it, did not feel anything. I then returned, took him for drive and he felt it. Left the car for him to take one of the "transmission" repair individuals out on a drive with the scan tool hooked up. Results of that test drive---"the car did it once, slightly but it was not picked up on the scan tool." Troy, from the service desk informed us they called GM to have their traveling engineer come look at the AT4 in a few day. GM's representative stop at the garage, DID NOT look at the car or speak to us, but has Troy tell us to keep driving the car. We are now in November and unfortunately, I got a little behind on bugging them due to the loss of my brother, father and step -father. But then again they have made no attempt at resolving this issue. This is frustrating. We are asking for any assistance that you can provide. I find it hard to believe that we are the only individuals that are experiencing these issues. I love my car. Why did they change the fluid if nothing was wrong the first time?? It has progressively been getting worse and winter is coming......

Today is Aug. 24, 2024. On [XXX], as my wife and I were preparing to leave on a vacation trip, our leased 2023 GMC Acadia would not move out of Low Gears moving forward. I soon discovered that it also would not shift into Reverse. When I took the vehicle to the GMC dealership near my home in Grand Rapids, Michigan, the service advisor told me that the Check Engine light was on. The dealer has had the car since the date of this occurrence, on [XXX], giving me a smaller car as a loaner. My service advisor told me that he was able to get the car into Reverse. When I have called, he tells me they are trying to identify the problem. I see on the Internet that this model of vehicle has had multiple "transmission issues" and that there has been a Recall due to the transmission. I have not been alerted to a Recall. Yesterday, on Aug. 23, I received an Onstar Diagnostics Report saying there is a "diagnostics alert" requiring "immediate attention." I leased this vehicle in October 2023 from Todd Wenzel Buick GMC, where the vehicle now is located in the Service Department. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While driving 55mph, I had to make a sudden stop due to a large animal in road now my engine lights is on and when I try to put it in to any gear it says the transmission is not in the correct position with a code PO700 (MIL) car will not go into any other gear unless I shut it off the car then start again.

The contact owns a 2023 GMC Acadia. The contact received notification of NHTSA Campaign Number: 23V172000 (Power Train) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.