today I stopped at the gas station to fill up and when I turned my truck back on after fueling up the speedometer, radio and power windows didn't work also my parking brake light was on when the parking brake was not. Also its down shifting harder then normal when the above problems started happening, this is the first time this has happened while I owned the truck. Can this lead to any problems/symptoms of any problems in the future any tips or diagnostics of the problem would be greatly appreciated thanks!!There is a c6 auto tranny in the truck with a 351 Cleveland