Justjoshiny

2006 GMC Sierra 2500HD, 6.0/4l80e push button 4x4 CCLB. This might be a stretch but maybe someone can help. I have this truck, bought it cheap with some issues. Fixed most of the issues and then it got struck by lightning. I would not have deemed it road worthy yet so I had liability on it. I know, dumb mistake. Anyways, the truck now only has the headlights on and the blower motor running full blast no matter the key position. If you put the key in the ignition, nothing happens. Turn the key forward and the check engine light and transfer case neutral light come on, and thats it. Its pretty fast to drain the battery so whatever it is, is a pretty large draw. I can also control the turn signals, flashers, and power mirrors but those are the only things I've found that work. What Ive done so far trying to remedy this. I know, its probably easier to write off as a loss and junk or pull the drivetrain, but Im somewhat determined. Pulled the PCM, checked for any signs of burnt connectors or any corrosion. None. With the PCM out, the check engine light doesnt come on. Pulled the BCM, no change in how anything works or happens. Pulled the underhood fuse block, checked all fuses, relays and connections. All appear to be fine. Obviously with the fuse block removed, nothing works. Can get blower motor to stop by pulling its fuse. Checked everything in the drivers side underdash fuse block, again everything appears fine. Pulled the little electrical panel below the brake pedal, all connections appear to be fine. Pulled the connections on the passenger side fuse cover thing and pulling the large brown connector shuts the blower motor off. Checked most of the grounds that i could find, all seem to be fine. If theres anything that I couldve missed such as another controller or something, let me know. To my knowledge, with the PCM out, the Interior should all work. It doesnt. With the BCM out, it should still run, but it doesnt.