On my 2003 GMC Sierra the guages don't always work. It usually occurs at startup and normally only in the morning. The digital display for the DIC works but the analog guages don't move. I thought there might be a TSB on this but can't find it. The problem began at about 40K miles and right before both batteries died. Battery replacement didn't fix the problem. Usually turning the truck off and then starting it again fixes the issue, but not always. Anybody encountered this one?