Abs brake problem. reoccurring engine problems such as misfire, low cylinder compression, afm lifters, camshaft, fuel mix and brake switch causes check engine light to come on. this causes stabilitrak and traction control to be turned off. discussions with several mechanics indicated a new engine would be the only way to fix this problem. even with a new engine, the problem persists. the check engine light continues to be "on" and stabilitrak and traction control continue to go on and off, and living in mi it is concerning me that i may lose these braking functions when i need them. gmc has offered no solutions. many, many forum discussions on the web indicate owners such as me should create a class-action lawsuit, as there does not appear to be a solution to this problem. the stabilitrak and traction control goes on and off as i am driving, typically on a highway.