On 1/06/2020, while driving, the brakes locked up on my 2018 buick enclave.(mileage about 23,000) the vehicle has an electronic parking brake ,which was off. suddenly, the parking break light came on and service lights were illuminated. fortunately, i was able to navigate to the side of the road, call gm and the car was towed to a local dealer. several weeks earlier, upon starting, the parking brake light would not go off and the car would not move. after letting the car sit for a period of time, the light went off and i was able to drive the car. i went to the service department of a local dealer., explained what happened. they told me that i should come back in when it happened again, so they could read the code and noted they have not heard anything around the issue before and that no bulletins have been received from gm. as i understand, as of last evening, gm has not given them any direction. i believe this is a potentially serious safety issue and from an internet search, it appears others have encountered the same problem.
The brake issue raised its ugly head again. the vehicle has operated fine since the original incident even with the front-end damage. yesterday, one week after the original incident it occurred again. cold start leaving a restaurant turned out of parking lot on to side street. traffic was stopped at a light and i pulled into the left turn lane. going very slow, haven't even traveled 200 feet. put pressure on brake pedal to stop and no response, the car keeps rolling forward as i applied extreme brake pressure. at that point i hit the emergency parking brake button and the car stopped just as i hit the rear end of the car in front of me. thankfully there was no damage to his car. i restarted the car and we pulled off the road into a parking lot to exchange information. everything operated fine. left the scene and headed home. when the light changed, i turned left from the side street into traffic. heavy traffic, slow go. about 1 mile later the traffic slowed down to stop. once again, the brakes were not responding. i was able to hit the emergency brake and ditch to the side of the road. after traffic passed, i restarted and moved about thirty feet into the safety of a parking lot. at that point i called aaa and had the car towed home. i will have it towed into the dealer this morning.
Cold start, ac unit on, engine at high idle speed. put car in reverse to back out of the garage. stepped on the brake pedal and the car kept rolling. pumped the brake peddle and applied extreme pressure, car did not slow down. panicked that i would hit a wall, i dropped the car from reverse to drive. still on high idle, the car would not stop even with extreme pressure applied to the brake pedal. car continued forward and hit a cabinet in my garage causing considerable front-end damage. every thing happened so quickly, i couldn't understand what happened at the time. the only thing i could think of was that i must have done something wrong. restarted the car and all functions were fine. the damage did not affect the operation of the vehicle. i drove to the dealer and i'm waiting for an estimate to repair the damage.
While driving the car the electronic parking brake turned on (without the driver commanding it), stopping the rear wheels from rotating freely, making it very difficult to drive the car. the car was in motion when this happened. this has happened 3 times, on the second time the dealer was able to see the problem and performed a "calibration" but the problem happened again about 1 month later (last night 7/23/19) and left the car stuck in the middle of an intersection, requiring a tow truck to move the vehicle - we took the car to the dealer. the car is currently at the dealer awaiting a diagnosis. i have also contacted gm reporting the problem but they are saying without seeing the problem they won't be able to do anything. this is a relatively new car, 2018, bought in march 2018 and has 24500 miles. pressing the parking brake release button did not release the parking brake when the problem happened, nor did the automatic brake release process work. there was an error message on the dashboard reporting "service parking brake"
There are two issues: while backing up the car, especially down a hill, the brakes do not work/engage temporarily. eventually the brakes engage, but you travel further than you intend. the "service brake system" light appears also. this is an intermittent problem. the second braking issue is that the emergency brake will engage without the button being pressed. it just happens and it the emergency brake is difficult to turn off, the car may nee to be turned off on back on to fix. the "service emergency brakes" light appears. this has happened while backing up and in forward in normal driving conditions.
I was stopped at an intersection at a traffic light & when the light turned green, i turned left & i'm uncertain if my emergency brakes kicked on or if my car simply stalled out, but my car suddenly would not move. my purse, in the passenger seat flew forward & hit the floor of the vehicle. the car behind me at the light nearly rear ended me, but fortunately did not. we brought the vehicle to jim ellis buick to be serviced, but they said it appeared fine & was confused. i definitely was not in any danger of hitting anything when turning at the intersection. this incident has made me uneasy when operating my car.
I was driving the car and when i depressed the brakes the brakes did not engage. the dashboard illuminated with a "brake assist: alert and i could feel the abs brakes engage. luckily this happened while i was pulling into a parking lot. only had 1,200 miles. had vehicle towed to dealer. check engine light did come on and showed code p0557. they replaced the crank shaft position sensor wiring harness and 2 gaskets, based on a repair bulletin and then before i could get the vehicle home it happened again. no brakes, but brake assist activated and abs was able to stop the vehicle. check engine light came on again and showed codes p0557, u0401, u0121, & u0078. had vehicle towed to dealer again. this time they replaced part # 84341899. luckily both instances happened at low speeds and i was able to safety maneuver the vehicle to a place where i could get towed and nobody was in front of me.
On only the third day after purchasing a buick enclave avenir 2018 i had a safety issue involving the brakes. when applying the brakes a grinding noise with an inability to properly brake and a red service brake assist message appeared on my dash. this has happened from a cold start as well as after being in motion at least 20 minutes city driving. my car has since been in the dealer on 4 occasions replaced three parts and is still currently at the dealers. the dealer has had my vehicle longer than i have almost 40 days now with no information on when i will have it back and i have onlly owned my vehicle for two months.