I would be willing to bet this will be taken care of under warranty, even if it takes until the vehicle is out-of-warranty. At the very nice family-owned Chrysler dealership I worked at, as long as an intermittent problem was documented while the vehicle was in warranty, it would be handled well into the future. "Documented" simply means they wrote up a repair order in their service department. I would be willing to bet GM has a similar policy although any dealership can try to change the rules if you aren't an informed owner. I can give you more details if necessary, but it probably won't come to that.
Intermittent problems are a major frustration for mechanics because if they do anything at all, and the problem goes away, there is no sure way to know it's fixed. All they can know is if it acts up again, it's not fixed. You can have the most conscientious and reputable people working on it, and trying their hardest, and customers will still get angry with them when they can't solve it right away.
check to make sure your grounds are good the one on the left end of dash look like it might be the culprit. also under the passenger seat. looks like all of them connect there.
Wednesday, May 2nd, 2012 AT 8:35 PM