2019 Buick Envision

Driving home from work and I seen the "service brake assist" light popped on. I did not know what that meant, until I tried to slow down around a curve. The brake pedal was extremely firm and mad stopping in time almost impossible. I made it home and looked on internet for answers. I checked the sensors, brake fluid and checked again and no help. I noticed a puddle of oil under the car and checked the lipstick which showed i was very low on oil. The next day I had to tow the car 45 to 50 miles to dealership. The dealership had car for 3 days and told us it was the brake vacuum pump that failed. The vehicle was not under warranty and we paid over $800 to have it repaired. We live off a busy road and it was very hazardous driving it home.

I have a warning on my dash, "Service Brake Assist" that comes on and off, but will not stay on. The dealer says they can't identify the problem unless it stays on and then bring it in. I did some research and find a class action complaint suit in 4 different states, of several GM cars manufactured between 2017 - 2020. Mine is a 2019 Buick Envision. The class action suit identifies the "Brake Vacuum Pump" defect. The defect will be known, when you step on the brake, the pump fails by exploding, and you have little or no brake whatsoever. More than likely causing a car crash and potentially loss of life. So what am I to do ? Wait for the pump failure and CRASH! Please look into this situation and potiential save lives.

The contact owns a 2019 Buick Envision. The contact stated that while driving at various speeds, the vehicle abruptly stopped without driver input. The brake assist warning light was illuminated. The message “Brake Assist Failure - Drive with Caution” was displayed. The vehicle was taken to the local dealer but was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the local dealer. The failure mileage was approximately 30,000.

WHILE DRIVING THE VEHICLE, THE SERVICE "BRAKE ASSIST" LIGHT CAME ON. I PUT MY FOOT ON THE BRAKE AND HAD NO BRAKES, THEN HAD LIMITED BRAKES WHEN SLOWLY PUMPING THEN PEDAL WENT TO THE FLOOR. THAT WARNING WENT OFF AND THE MALFUNCTION INDICATOR LAMP CAME ON. I THEN HAD ABOUT 85% BRAKES.THIS HAS HAPPENED THREE TIMES. THE DEALER AND GM CANNOT FIND THE PROBLEM. THE FIRST TIME I WAS ON A HIGHWAY. THE 2ND TIME I WAS ON A STREET IN TOWN AND THE 3RD TIME I HAD JUST PULLED OUT OF A DRIVEWAY IN A SUBDIVISION, AFTER THE CAR HAD NOT MOVED FROM FRIDAY TO SUNDAY.