2015 Chevrolet Impala transmission problems

Filed Apr 15, 2025 · Transmission · 84,000 miles · FL

The contact owns a 2015 Chevrolet Impala. The contact stated while driving approximately 70 MPH, the transmission was slipping and unexpectedly downshifted to a lower gear. The contact stated that the vehicle violently shuddered. The contact stated that the check engine and stability control warning lights were illuminated. The contact stopped the vehicle due to the shaking and shuddering and had the vehicle towed to a dealer. The dealer diagnosed the vehicle and determined that the Transmission Control Module and a wiring harness needed to be replaced. The vehicle was repaired. The contact stated that the failure recurred two more times. The contact had taken the vehicle to the same dealer, and the TCM was replaced. The vehicle was repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 84,000.

Filed Aug 22, 2024 · Transmission · 171,000 miles · NC

The contact owns a 2015 Chevrolet Impala. The contact stated while driving at an undisclosed speed, the vehicle downshifted and shuddered abnormally. There was no warning light illuminated. The vehicle was restarted; however, the failure recurred. The vehicle was taken to the dealer to be diagnosed. The contact was informed that the torque converter had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 171,000.

Filed Apr 27, 2023 · Transmission · 136,000 miles · MD

The contact owns a 2015 Chevrolet Impala. The contact stated that while the transmission was in drive(D) with the vehicle idling on an incline, the vehicle inadvertently rolled backwards. The contact indicated that the brake pedal had to be depressed to stop the vehicle from rolling backwards down the hill. The cause of the failure was not yet determined. The manufacturer and local dealer were not yet notified of the failure. The failure mileage was 136,000.

Filed Jan 13, 2022 · Transmission · UT

Automatic transmission shifting problems. Shifting from starting to any kind of incline resistance, car can not shift through first 2 gears. Shaking, rumbling, check engine light flashing, engine bogs, car slows down, causing safety concerns. Had car checked at dealer. Reprogramed transmission. Did not fix it!

Filed Dec 26, 2021 · Transmission · VA

The manufacturer patented Stabilitrak system continues to fail on my vehicle. Initial ODI 114406439. Dealership charged $1,7832.15 to replace transmission control module (TMC) on 11/5/21. On 12/22/21 vehicle indicated the exact issue (Service Stabilitrak), took vehicle to same dealership, awaiting response. The car is not drivable when "Service Stabilitrak" is indicated as engine power is substantially reduced. GM technical service bulletin PIC5992A seems to apply to my issue. However, Chevrolet and the dealership says it does not apply, but continue to charge for engine light analysis and unnecessary, expensive repairs. Your assistance would be greatly appreciated. Vehicle is once again inoperable (3/4/22) due to this issue (service stabilitrak). Consumer stated almost $3,000 was spent with no resolution. Consumer stated vehicle fixed with used parts from a junk yard— new parts were not available.

Filed Oct 22, 2021 · Driver assistance, Transmission · VA

The stabilitrak system GM installed on my vehicle repeatedly indicates a "service" notification. Once this occurs, my vehicle loses power and the ability to shift into any driving mode. This issue began around 60,000, I currently have 77,500+ on my vehicle. GM issued a technical service bulletin (PIC5992A) for my vehicle, however, denies it's the issue and will only attempt a repair from a computer code, which they continue to fail to replicate. The occurrence of this issue is especially worrisome on any interstate highway. ODI 11406439

Filed Oct 2, 2021 · Transmission · AZ

When I put my car in park it rolls back like it's a manual it does it also when I am in reverse and go to drive. Also while driving my gear shift if someone touches it or hits it will go from drive to neutral worried it will go to park or something dangerous about two years the vehicle its done this the dealership said normal and it is not.

Filed Apr 12, 2021 · Steering, Transmission · 89,866 miles · TX

I have replaced my hub bearings on my both front tires twice . I continue to get a grinding noise and jerking while I'm trying to accelerate. While reversing, turning left or right this happens. Also doesn't matter the speed. This is very dangerous as it almost caused me to get into several accidents. I put my money and trust into chevy. This should be absolutely be a recall.

Filed Feb 1, 2021 · Engine, Transmission · 151,345 miles · SC

There is a slight vibration around 20 to 30 MPH as gears are shifting and it goes away...does it repeatedly at same position and everything goes back to normal...no codes or lights on dash happens mostly in motion on inclines and even ground at same speed grouping

Filed Jun 24, 2019 · Transmission · 79,361 miles · GA

Tl* the contact owns a 2015 chevrolet impala. While driving, the speed failed to exceed 50 MPH and the check engine indicator illuminated. The vehicle was taken to courtesy chevrolet buick gmc (1220 e stone dr, kingsport, tn 37660, (423) 343-5036) where it was diagnosed that the transmission fluid was dirty and needed to be flushed. The vehicle was repaired. The vehicle was taken to jackson chevrolet buick gmc (1975 n main st, lafayette, ga 30728,(706) 638-4222) where it was diagnosed that the transmission sensor needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was 79,361.