Buick Lacrosse won't shift problems

Filed Sep 29, 2026 · Acceleration · IL

My 2017 Buick LaCrosse Premium AWD experienced a sudden, dangerous mechanical failure of the Accelerator Pedal Position Sensor system while operating the vehicle under normal road conditions. The vehicle suffered an immediate loss of engine continuity and engine power, forcing the car into a hazardous low-speed limp mode while in active traffic. A certified repair facility inspected the vehicle, confirmed a complete failure of the internal pedal sensor circuit, and replaced the unit to restore safe operating throttle control. This specific electronic and mechanical defect represents a widespread manufacturing vulnerability that General Motors has officially acknowledged under Special Coverage Adjustment N182188250. This failure poses an immediate safety hazard to occupants and surrounding traffic, as a sudden drop in throttle response on highways or busy intersections leaves the driver unable to maintain safe traveling speeds or accelerate out of oncoming hazards. General Motors has opened Corporate Case #113840289 regarding this failure but has failed to issue my safety reimbursement.

Filed Nov 30, 2022 · Engine · 83,907 miles · GA

The contact’s wife owns a 2013 Buick LaCrosse. The contact stated that on several occasions while the brake pedal was depressed, the vehicle lunged forward and the engine stalled; however, after releasing the brake pedal, the vehicle went into LIMP Mode and then lunged forward. The contact stated that the engine engaged at low speeds. Additionally, the contact stated that there was an abnormal grinding sound coming from the vehicle. The oil warning light was illuminated. The vehicle was taken to the dealer where the cause of the failure could not be determined. The vehicle was taken to a different dealer where it was diagnosed that the main drive belt and valve cover gasket needed to be replaced. The vehicle was then taken to an independent mechanic where it was diagnosed that the valve cover needed to be tightened but the cause of the failure could not be determined. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 83,907.

Filed Oct 31, 2022 · PA

In October 2021, while driving, the car lost power. Several indicators displayed at the time, including: • Service Engine • Service Stabilitrak • Service Antilock Brakes • Service Transmission I managed to pull the car to the side of the road and restart it, but it was stuck in first gear. After several restarts it performed normally. I took the car to Miller & Sons, they told me they could not find a code and the car was performing normally at that point so there was nothing they could do. They told me if the car did it again, to bring it in immediately so they could get a code for the malfunction. Two weeks later, the same malfunction occurred, I took the car directly to Miller & Sons. Once again I was told they could not find a code or problem and I was sent away again. The third time this malfunction occurred, I was driving at 40 miles an hour and the car began to accelerate on its own. I could not brake, shift to park, shift to neutral, steer or apply the emergency brake. After about 15 seconds, the car shut down in the middle of the road. It could have caused death or seriously bodily injuries to me or others. At this point I had the car towed to Miller & Sons. I am told that while test driving the vehicle, it also accelerated on the mechanic [XXX], almost causing an accident again. At this point the told me they found 60 codes dating all the way back to the first incident, but they still did not know the problem, they replaced the Transmission Control Module in hopes that would solve the problem. It did not. In August, the same thing happened. They replaced the transmission control module again. About a month ago (September 13) it happened two more times. It is still sitting at Miller & Sons. This time I contacted GM for some assistance. I was using the messaging system (case number [XXX]) I was told a senior advisor was assigned to my case and that a TAC team would consult with the dealership to diagnose and correct the problem.... INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (F

Filed Oct 22, 2020 · Engine · 110,000 miles · CA

My 2013 buick lacrosse has a malfunctioning transmission control module which it already recalled by gm but my car does not fall under the recall because of my VIN the malfunctioning transmission control module cause my car to go into limp mode in the middle of the street in traffic

Filed Apr 24, 2020 · Driver assistance · OH

I have had my car in shop at least 10 times for the same reason and it never ends. They keep changing or doing something to the gear shifter. It keeps saying service transmission now it saying all kinds of warnings about steering exceeding speed track something plus service transmission won't shift soon etc it's ridiculous to pay this much for a car and have it in the shop this many times in 2 years it's in there again now and problem still isn't fixed

Filed Jul 30, 2019 · Transmission · 15,000 miles · IL

I purchased my vehicle in june of 2018. The car drove beautifully for about 14000 miles. Then I started noticing harsh shifts at lower speeds, shifted fine on the highway. This continued on and I just thought it was normal wear. Then about 2 months after the harsh shifting started I was getting on the highway and accelerating up to speed. I then let off my gas pedal and the car stuck in gear. I tried slowing down and speeding up and the car would not shift. I had to pull over shut the car off and turn it back on during rush hour. This happened again about a month later, so I called to make an appointment at the dealer. Took my car in and the service tech asked me to ride with and show him what it is doing. So I drove the tech around about a half hour. On the way back in traffic at about 35 MPH the car stuck in gear again with the tech in the car. They had the car a week and cud not replicate the issue again. They talked about reprogramming my ans but since no reported problems they could not do it. I have had the car back a month and it has happened twice again. So I will yet again make another appointment. This is very unsafe when the transmission will not shift to have to try and pull off on busy highways where there are not always safe places to do so.

Filed May 21, 2019 · Transmission · 20,200 miles · IA

Tl* the contact owns a 2017 buick lacrosse. The contact stated that the gear shift lever would misshift and switch into other gears that were not selected. Secondly, the transmission would not go into park or reverse properly. To reverse, the contact had to move the lever back and forth. To park, the contact had to select park, shift into another gear, and then shift back into park. The vehicle was taken to webster city auto (129 2nd st, webster city, ia 50595, (515) 832-6638) where it was diagnosed that a new shift assembly needed to be installed. The vehicle was repaired, but the failure recurred soon after. The manufacturer was made aware of the failure and did not assist. The failure mileage was 20,200. The VIN was invalid.

Filed Feb 10, 2019 · Acceleration, Engine · 74,930 miles · MI

My car stated that my trakstabilty system needed to be serviced then reduced engine power lite up. Car would not shift and would not increase in speed over twenty miles per hour. I had to pull over and turn my car off leave it parked until I could get it to the dealership. The throttle body was defective. This has happened on other 2011 lacrosses and their is a special service bulletin with free repair but for some reason not in mine. I had to pay 500 dollar to replace this. My car only has 74000 miles on it and I could have been injured if I wasn't in a place where I could turn my vehicle off safely.

Filed Apr 15, 2018 · Transmission · 89,000 miles · WI

The transmission,with approx 89,000 miles burned up while I was on a road trip. I was 9 hours from my home and alone with a full car of vacation equipment. I was on interstate 24 in nashville tennessee. I pulled off and a service station checked why the engine light was on. They said the codes showed transmission problems. I should try to get to the nearest buick dealer, in clarksville tennessee. They said it would make it. I was alone. Thank goodness for onstar. I had to spend the night in clarksville because the dealership was closed and it was getting dark. The car was barely moving by now. It was frightening. I stayed the night at a baymont in clarksville and was at the dealership at 6 30 am. Was praying it could be fixed and I could continue on my was to milwaukee with my beautiful car, which I had put so much effort in keeping in good running condition. Just before my trip, I had replaced my tires with beautiful michelins, and sick my car had gone into limp mode twice, replaced the throttle body. Everything ready for a road trip to amelia island from milwaukee. Wyatt johnson dealership said the transmission was shot. 4500.00 to fix, and would take a week. I was stuck. I had to get home 9 hours away. I would need a rental to drive home, then drive back then drive home if I would have the new transmission. I gave my beautiful car to them for 1500.00. I bought another 2015 lacrosse. I had to unload a full car into the new one. Extremely frightening situation. I now have a 2015 buick lacrosse which I bought for 19,800. Just so shocking that an american made transmission would burn up at 89,000 miles. The car was in motion, but in slow traffic on the expressway in nashville when the problem began. I will send copies of all documents.

Filed Jun 22, 2016 · Transmission · 143,000 miles · GA

"takata recall" we bought a used 2005 buick lacrosse for our son in april 2016; at first it ran perfect and then we noticed a thump when changing gears (automatic transmission). Two weeks ago my son was going to the store and "drive" stopped working. Now it is sitting in the yard and will only go into 1st and 2nd gear and reverse. It will not go into drive.