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2005 Chevrolet Cobalt
My key flob worked one day and quit the next. Tested the flob's battery and it was good. Tried another battery, no luck there either. The second key flob is in my daughter's dorm room at college so I can't do a comparision to see if it is the vehicle or flob. The only thing that occurred between the flob working and not was that the vehicle was in for an oil change. In fact the flob was used to unlock the vehicle in order to get to the oil change and wasn't used again till the next morning when it didn't work. I was thinking that possibly a fuse was pulled to reset the oil reminder and the keyless remote was reset by accident.
Any info, much appreciated!