NHTSA complaint #11441371

Owner complaint summary

While safely driving under normal conditions, I attempted to slow my vehicle down while approaching a vehicle that was making a right turn into a parking lot. Upon trying to apply the brakes, I was met with resistance (Hard brake pedal) which prevented my vehicle from properly slowing down. This was caused by a failed/malfunctioning brake booster/vacuum pump. Since I was driving at a safe distance, I managed to barely avoid colliding with the rear of the car making the turn, however, that miss was extremely narrow. My vehicle barely slowed down when the brakes were applied which, had I been on the interstate or traveling at a higher rate of speed, would have more than likely resulted in a collision. This DEFINITELY puts myself, my wife, and our 2 children's safety at risk. Once I successfully parked the vehicle, a "Service Brake Assist" warning messaged appeared for the 1st time. I began researching/attempting to diagnose the issue. During this time I came across several articles detailing a recall issued by GM describing the exact same issue with the brake booster/pump, ironically however, it only covered vehicle produced through 2018. I then contacted GM customer service to alert the manufacturer and see how they would rectify the situation. I was informed that my vehicle had no open recalls and was out of warranty & there was nothing they could do for me.(handwritten call log can be provided upon request) When I contacted the dealership, they informed me they were unable to see the vehicle until the 1st week in Dec. I was left to take it to my local mechanic who, upon his diagnosis, informed me that it was the vacuum pump that had failed. As previously stated, there were no warnings prior to the failure. The "Service Brake Assist" appeared AFTER I managed to safely get my vehicle to a parking spot.