My boys eg is having problems turning on sometimes. The battery, alternator, and starter are straight. Won't crank, do not hear anything. After another try or a couple mins, it will then turn on. Have an on/off motor cut off switch, but it's working like its suppose to. ls with gsr tranny. Any suggestions?
Thank you.

 

Sounds like a bad ground. Remove them all and clean the ground points with a wire brush. If they look bad replace the cable.