2018 GMC Terrain

The Safety Restraint System warning keeps coming on and off as well as the air bag light. It happened months ago so I took it in and got it looked at and scanned. All the seatbelts were checked and the scan came back with nothing. Then it stopped for a couple months and now it has started again. Ive had 14 surgeries in the last little less than 4 years and I'm about to go into my 3rd back surgery since November. I cannot get into an accident and not have airbags as I've also had brain surgery 3 winters ago as well. I am disabled and do not have a ton of money either for fixes that aren't necessary but this safety issue is crucial to me. I see that many 2018s have been recalled for the exact same issue that I'm having however mine doesn't come up with that but it is happening to me so that should be included. I also need some direction if not as to why this is happening because I cannot afford to have a dealership, no less, replace every tiny little thing looking for the culprit at $150 an hour when I live on $1,200 a month and most goes to medical. Please advise on what to to or where to start. Thank you.

While getting off the interstate, the brakes failed with no prior warning, or issues. The brake pedal became extremely difficult to depress and stopping distance was greatly increased. Could not come to a complete stop without using the emergency brake. We drove home (about 2 miles from the interstate exit) and about a half mile after the brake failure, a "service brake assist" light illuminated. Vehicle was towed to dealership the next morning. The problem was the vacuum pump exploded and caused vacuum to the brake booster to be lost, making the pedal difficult to push. Luckily this happened at 11pm and there was nobody in front of us, there definitely would have been a collision.

At ignition, vehicle tire pressure monitoring system indicated low tire pressure in rear right wheel of 9psi; right front tire indicated 38psi and left front and rear indicated 38psi. Driver verified pressure as good at 38psi in rear right tire with hand held gauge. While operating the vehicle on the interstate, vehicle driver experience a flat tire in the right front passenger tire. Tire Pressure monitoring system indicated 41psi in right front tire (even while flat), and indicated right rear tire at 0psi even though it was visually inflated.

I have a 2018 GMC TERRAIN which I bought brand new from General Motors. In May 2022, the vehicle started jerking/hoping and trying to stall when the speed gets to 55 miles per hour or higher. I have taken it to the dealership on three different occasions for repair and I still have this issue. General Motors engineers were involved in every step of the repairs. They just do not know what is going on with the car or fix it and they are too stubborn. The dealership told me today that they cannot do anything else to the car. They also said they had a code from the engine last week and General Motors said they do not know what that code means. They are forcing me to accept/drive the car in this unsafe condition. I have contacted them multiple times and they do not care.

6/3/22 I went to the grocery store which is on a four lane road. When I left the store I had no brakes. On a four lane stop and go road. The was no warning just nothing peddle to the floor and now check engine light is on. I am reading this same problem repeatedly. I love this car but this is a serious hazard and needs to be addressed. We are all driving around practically rear ending people. I was an inch from the guy in front of me thank God the light changed as I was coming up on him or I would have hit him.

I was driving out of town (2 hrs from home) with my 2 small children and my mother, when I tried to slow to come to a stop my breaks did not work and I almost rear ended someone. It was sudden, there were no signs that my breaks were going to mess up. When I tried to look up recalls, there were none for my vehicle BUT there were MANY statements of people who drove gmc or gm vehicles that had the same issue with the vacuum boost for the brakes around 50k miles where the breaks just quit or were hard to use. It seems to be a common issue and is VERY unsafe. I cannot afford to fix the issue and I don't feel as though I should have to if other terrains have been recalled, except mine which I do not understand.