I noticed that the volt meter was indicating a reading of almost 16 volts and had the dealer check out the electrical system. The electrical system checked OK. The dealer did check with the Chevy Service Rep and there was one other vechical in Washington State that had the same problem, Chey thinks it might be the volt meter problem. This is a set of factory installed gauges in an 05 built in August of 2004. I will keep the posting updated when I have additional information