H3 randomly won't start - pull battery & wait

[Ryan Graham]

Dealt with a similar problem on an older (2003?) GM vehicle and it turned out to be the ignition switch itself (electrical switch, not lock cylinder). Although disconnecting the battery had no effect on it. Do you think it's the battery disconnect, the time (45 mins), or the number of times you attempt to crank it that determines when it will start? Did the problems start immediately after the BCM replacment? Sorry, not much help with this one.