My Dad has a 98 Pace Car, about 20k miles. Since he bought the car, every once in a while the dash would reset... basically, the gas mileage would go back to 0 etc., like the battery was disconnected. There doesn't seem to be any set reason for when or why it happens. It doesn't happen all the time, just every once in a while... He knows when it happens because the display goes back to the odometer, which he never looks at during normal driving. Has anyone else had this problem? the Chevy dealer has been no help at all. They put in two new batteries and new battery cables... any ideas?