I can't remember anyone replacing the BCM. EVER - anyone else?

I am not home and can't check the manual, but I will look at that what fuse protects when I DO get home tonight.

If the fuel door is the ONLY one not opening, that is odd. The locks are ALL pneumatic and driven by the same pump. One stage opens the driver's door and the other "stage" pretty much opens everything else. I don't see what a sound system install has to do with it.

If it wasn't for fuse 7 blowing, I'd tell him to clean the battery terminals (including inspecting the ground lug and screw on the ground cable) and replace the battery.