Bought a distributor cap from dealer. It Went bad less than a month later leaving me stranded on the highway. I'm Very dissatisfied with ACDelco parts. I'm a GM Certified tech with 25 years experience. This should not have happened. Now I have more time and money invested in something that should have been an easy fix. Had to have my vehicle towed at additional cost. You can reach me at [protected] Andrew Kredel