I have a 2008 Chevy Silverado 2500 and every two days the clock resets to 12:00 and the date changes to 1/1/2004. In addition to this the temp changes from what ever I had it set to to 74 and the raido station changes to an FM station that I did not have it set to. I do not loose my presets or anything else.I checked at the dealer and he said he has never heard of the problem and that I would have to pay at least $200 to them to see if they could figure it out. I just got the truck back from them about 2 weeks ago when they had to replace the 6 disk changer and put in 2 new batteries. The truck starts up fine and does not show to be low on volts. Any Ideas????