I am about ready to flip out. My 2003 H2 interior electrical is all messed up. All at once everything quit (windows,locks, gauges, a/c, transfer case selector, stereo etc.). I have good battery, checked cleaned all chassis grounds, fuses, new ignition switch, new programmed BCM installed and still not working properly. Any help would be great cause it is time to get this truck back on the road. Thanks

 

it does sound like a dirty or broken ground since so many systems seem to be affected at once. try googling for the wiring diagram then see if all those systems share the same ground location point.

 

Stop throwing parts at it and get a power probe.

 

I got one. Master kit