2020 Chevrolet Trax

This is the 3rd time this has happened in our vehicle, my second complaint here. I was driving on the interstate at posted limit of 60 when brakes began locking up on me. I got it off to the side of the road, I thought my car was going to flip over the brakes locked down so hard. Service stabilitrak light came on, abs light and traction control light came on. I called the dealership who told me onstar provided the stabilitrak code for it. They told me it would be 160 to have it hooked up to diagnostics, that if it isn't covered by warranty it is a customer assumed cost. My husband replaced the ignition coil and spark plugs thinking that it was the problem, well over 200.00 for parts. The car is now doing the same thing, but I noticed it happened an incline, then realized it happened the 1st and 2nd time on a decline. I am now wondering if the transmission isn't going out at 47,363 odometer miles. The dealership is no help, they have the actual codes but won't provide them or tell me what's wrong. All I know is that for a 25,000 k car, it's dangerous. I am lucky I was able to maintain control of the vehicle on an interstate highway.

My husband and I were leaving a local grocery store, when we began backing up and the "hillside assist" light came on for a 5% or so incline. So after backing up, we pulled out of the parking spot and our brakes began locking up, this continued all the way home (about 3 miles). The error msg, "service stabilitrak" came on when we were pulling into our driveway. We called the dealer where we purchased it because we have less than 48000 miles on it and they said that we may have repairs covered under the power train. However, stabilitrak is not part of the power train, I guess he didn't think I would know that. So we hung up, and did a little forum research and found out we would have to reset the computer to make it "unlock" the brakes. We unhooked the battery for half an hour and reset the computer and it worked, our car is running fine now. My husband was a truck driver for a decade, he knows how to drive in potentially risky situations. However, I think it should be investigated because of the potential safety risk. Since we were doing 25 mph or less this was easily handled for a short distance. However, this would be catastrophic if someone were on the highway when this happened. It could easily cause an accident at any speed. Anyone with less skill than a seasoned truck driver, could be killed if this happened to them. Please investigate this matter.