One problem related to brakes failed has been reported for the 2021 GMC Terrain. The most recently reported issues are listed below.
I was going to my sons home which is located on a steep dowhill street with several turns, one of ther almost 90 degrees. As I started to desend the hill and gain speed, I depressed the foot brake. It did not respond at all. As I continued to gain speed and coming up on the sharp curve, I continued to pump and apply brake . The brakes did not work. I continued to gain speed and go around 2 other turns. At the end of the street I had a choice to contine straight ahead and hit a house, turn right and continue down another steep street until I hit a home at the end of the street or try to turnleft andgo up hill. I turne left up the hill and finally got stopped befor I could put the vehicle in park or apply the brake I begainto roll backwards on the steep incline . I rolled by andhit a curb, jumped into the yard and hit a bush,small tree and an electric ground transformer, coming to reset about 4 feet of the ground on top of the trnsforer. . The utility workers said that I was lucky not to get eectrocuted. This vehicle waspurchased about 7 day prior to the accident, the brakes simply failed addid not work at all.