Brake Master Cylinder problems of the 2019 GMC Sierra 1500

Tl the contact owns a 2019 GMC Sierra 1500. While pulling out of the parking lot, the brake warning indicator illuminated. The vehicle was taken to mcdonald GMC Cadillac (5155 state st, saginaw, mi 48603, (989) 319-4136). The dealer tested the brakes, replaced the master cylinder, bled the brakes, performed a road test, and declared that the failure was remedied; however, the failure recurred during a road trip 200 miles away from home. During the failure, the brake pedal traveled all the way to the floorboard again and the warning indicator turned off. The contact managed to drive home slowly. The manufacturer was contacted and provided a case number. The manufacturer stated that a case manger would call back within two days. The failure mileage was 3,930.

While driving my truck approximately 45 mph on a street, I heard the vehicle notification alarm sound, I looked down at the dash and had several warning lights illuminated:I had four messages: service esc service trailer brake brake system failure - 62 mph top speed steering assist reduced drive with care lights on dash that were illuminated abs check engine brake traction control before I could read each warning light, a red stop light was approaching. I was at that time I pressed on the brakes and realized that my brakes were extremely spongey. I figured I only had about 10% braking power. With my two year old in the back seat, I pushed as hard as I could to stop my truck. Luckily, by the grace of god, I was able to stop my truck without rear ending the car in front of me. My truck was then towed to the dealership. I bought the truck 5 days prior. My truck has approximately 161 miles on it. The dealer told me the next day I needed a new master cylinder and hydro boost. Probably the absolute worse component to fail on the driver while the vehicle is in motion.