I have a 06 Cobalt automatic that is going into neutral while you are driving. Shiftier stays in drive. Speedometer and the tach both go up and also i can hear the radio get louder. No codes or lights. All the fuses in the BCM are like they have been hot or a smoke film on the prongs. It is a random thing. You might drive miles and it not do it. Than when it does it seems to do it several times.