A BCM is a body control module. Basically, it runs several things on the vehicle's electronics. In 82, I believe they were behind the driver's side kick panel. You will need to have it checked.
As far as the tanks, that is a good question. When you switch it, have you checked to see if there is any fuel pressure from the bad tank? To me, it sounds like a wiring issue. Have you checed the wiring to the tanks for damage?
Sunday, August 15th, 2010 AT 9:17 PM