Daughter's car was leaking coolant. We found the leak to be BOLTS that were coming loose and retightened two times, and were puzzled as to how they could keep coming loose. Were they the wrong bolts? I finally ordered bolts which were exactly like the ones in place and had them installed with Locktite to keep them in.

So far so good. This should not happen! It has not happened to any car or truck anyone in our family has owned. I never buy another Chevy or GM product.