Just bought an 07 gmc duramax that was struck by lightning.Previous owner preplaced bcm and tried to have it flashed at the dealer to no avail. Said it wasnt communicating with all components. Question is "do all components that are controlled by the bcm need to be plugged in to reflash bcm?" It has a number of electrical issues. Does the bcm controll the starter also or is that the pcm ecm? Any answers would be appreciated. Where would you start if you just bought it?.........Thanks again Steve

 

I'd start by not buyin it, but good luck

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I take that back, I'd buy it if the price was right

 

they replaced the body module??

did they replace the ECM? the ECM controls everything in the truck..

 

I would find a junk yard and replace everything.. My opinion, I think you're going to be chasing gremlins for a long time in that truck.