Buick Enclave won't shift problems

Filed Oct 13, 2026 · CA

Shift gear won't go into park. Emergency brake locked. Had dealer look at it and apparently a valve is blocked in transmission. Seen a number of complaints about transmission issues on this particular model yet this Vin is not on recall. GM says it needs a whole new transmission which will be $10,000. Really?? The least they could have done was fix this vehicle in good faith because of past recalls. Now I'm stuck with no vehicle and still paying for the finance.

Filed Sep 3, 2026 · Transmission · 30,000 miles · VA

The contact owns a 2023 Buick Enclave. The contact stated that while driving 70 MPH, the transmission unexpectedly downshifted to 3rd gear and the vehicle decelerated. The contact stated that the vehicle went into LIMP Mode. Additionally, the computer system took control of the vehicle. The contact stated that the failure had occurred while driving in the center lane on a busy highway. The vehicle was driven to a safe location. The vehicle was towed to the dealer and was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was repaired. The failure mileage was approximately 30,000.

Filed Jun 30, 2026 · Engine, Fuel system · OK

Driving home from work on interstate, 2 month old 2026 Buick enclave jolted and shut off completely while going 65mph. Barely pulled over safely to the left side (Oklahoma drivers). Restarted car, check engine light illuminated with messages of reduced engine power (limp mode up to 35mph) while stuck on highway, traction control and esc disabled. Was able to get off highway and limp to nearest GM dealer. They performed diagnostics 3 days later and replaced the fuel rail pressure sensor. It did not fix it. More codes according to dealer and they are involving engineers. Moving next week on military orders and car is still being worked on with no estimate of time to complete. Insanely concerning safety hazard for a brand new car to shut off on the highway. Could have died or killed others in accident. Unable to invoke lemon law yet but not comfortable driving the car again especially across the country on limited time.

Filed May 16, 2026 · Engine, Transmission · TX

While driving, the vehicle suddenly and without warning experienced a severe, dangerous loss of acceleration. The dashboard immediately displayed a "Reduced Engine Power" warning message along with a "Service StabiliTrak" light, forcing the vehicle into an immediate electronic fail-safe "limp mode." This sudden, drastic reduction in engine power severely restricts the vehicle's ability to maintain safe roadway speeds, accelerate from a stop, or merge safely into traffic, posing an immediate rear-end collision hazard to myself and other motorists. Furthermore, the defect simultaneously disables critical active safety systems by shutting down the StabiliTrak and Traction Control networks. A diagnostic scan revealed code P2138 (Accelerator Pedal Position Sensors 1-2 Correlation Not Plausible). Investigation reveals that this is a widespread, systemic safety defect caused by design flaws in the vehicle's body. Rainwater and moisture from clogged factory sunroof drains or cowl seams leak directly down into the interior cabin wall, pooling into the primary instrument panel-to-body wiring harness block (X218 connector) in the driver's side footwell. This water intrusion causes green corrosion on the delicate pins, short-circuiting the 5-volt reference sensor circuit for the throttle controls while the vehicle is in motion. General Motors is fully aware of this exact defect and has documented it internally via Technical Service Bulletin (TSB) #10-00-89-017H (and related GM TSBs). Because this defect causes unexpected, immediate engine failure and disables traction safety networks while driving, it constitutes a severe safety hazard that should be escalated to a mandatory safety recall.

Filed Jan 3, 2025 · FL

The car stalled and is stuck in park. It has electronic shift and if the engine doesn't run it has to be put into neutral manually. The Buick dealerships don't know how to do this and keep referring me to an obsolete video. One service representative suggested the manual lever is under the air filter housing but they cannot provide any information on this design, The car is stuck in a garage and cannot be towed. It is stuck in place.

Filed Aug 21, 2024 · Electrical, Fuel system · KY

Vehicle would not go into park fortunately we were in a safe location to avoid a possible accident or injury. The vehicle has electronic transmission shifting. According to the dealership the park solenoid in the transmission valve body failed. This prevented us from putting the vehicle in park so it could safely be shut off. We were able to set electronic parking brake but ignition continued to remain on. Eventually had to disconnect the negative battery terminal. Had vehicle towed to dealership but could not release electric park bake or start vehicle with battery terminal reconnected. This is becoming a common problem with this transmission, so common that parts are on back order. This could be a very unsafe problem with this vehicle in the right circumstance. There should be a recall on this transmit that is used on multiple GM vehicles

Filed Apr 6, 2024 · Engine, Transmission · OH

Driving on the interstate at approx. 70 MPH when the vehicle made a lurch forward motion. The vehicle lost power.we were near a exit ramp and coast to the intersection. Vehicle would start but would not shift out of park. We could not move the vehicle. It would not even go into neutral to push the vehicle to safety. The police were called to direct traffic, while waiting for a tow truck. We attempted to restart the vehicle several time so we could it in neutral during the next 45 minutes . The police had to leave and made a final try to put the vehicle in neutral after restarting, it went into neutral . The vehicle was pushed to the shoulder and the police put flares out to advise of a disabled vehicle, and left the scene. After about 2hours and 50 minutes the tow truck arrived. The truck operator got into the vehicle, started the vehicle and put it into drive and drove it onto the flat bed tow truck. Vehicle was taken back to the dealer where it was purchased. We bought the buick new, 2024, with 3 miles on it. When this occurred it had 1814 miles on it march 13th 2024. Our phone app for my buick states that diagnostics results shows engine and transmission system to service now. Today is april 6 2024. Vehicle still not repaired. Cause of problem a sensor or transmission over heated and locked up the transmission. Once it cooled it could be moved. Buick customer care were notified case # available

Filed Jul 11, 2022 · Engine, Transmission · MI

Engine revving, would not shift even after taking my foot off the accelerator. Had to pull over and shut the car off. After restart, it was very hard shifting but the engine wasn't revving, Engine light stayed on. Engine revved between 3,500-4,500 rpms without shifting. The car can be very jerky when accelerating from a stop and shifting the first time or two.

Filed Dec 3, 2019 · Brakes · 28,000 miles · OH

Random activation of parking brake while the car is in drive. Most often occurs when on a slope and a low speed. Multiple incidents have occurred since purchase it has continued to get worse. The vehicle has been in for service many times with no resolution. I opened a case with gm on 9/12/2019 but they have not returned my calls or emails since 10/3/19. There has been several instances of this issue and was documented in a forum post that parallels our issue https://www.enclaveforum.net/threads/2018-avenir-electronic-emergency-brake-fault.22631/ 1) parking brake coming on at highway speeds as wife transported my daughter and some of her friends to the mall. At a red light, close to the mall my daughter commented on a smell. They pulled in the parking spot at the mall, my wife noticed the smell as well and when she exited the vehicle, the smell was overwhelming. 2) 2nd major incident while my wife was in a drive thru and the e-brake engaged (again, while the car was in drive). She had to place the car in park and it took 1-2 min before the car would disengage the e-brake. This incident convinced us that the problem was not human error and took it to dealership for service. 3) sept 2019 - wife became stuck in parking lot when the e-brake engaged as she pulled in a parking spot (still in drive). She was aware that the e-brake had turned itself on but when she hopped in the car to leave, the e-brake was still engaged and wouldn't release. Back to dealership where they cleared a code (first time a code was present) and re-flashed the e-brake control. 4) 12/1/19 incident while sitting at red light on a downward incline. Once I released the brake to move, the car didn't move forward so I looked down at the dash to see the parking brake light on for a quick flash then it went off and the car started to move. Car is back at the dealership.

Filed Aug 27, 2019 · Driver assistance, Engine · 170,000 miles · WV

While driving 60 MPH on the interstate in bumper to bumper traffic, my car went into limp mode. Rpms were high and I had to pull over from the fast lane with tractor-trailers driving around me after researching the issue, it seems this has been seen in alot of cars. This is a dangerous defect that needs to be resolved. I hope no one dies to make the manufacturer resolve this issue. The mechanic said this was a known issue with this vehicle. Recommended a transmission replacement. In fact, there were two other buick/gm cars with the same issue waiting to be worked on. The codes were p0776, p0796 and p0700.