Well that was kinda the easy part, the rear line goes to the valve, then out of the valve in a U shape steel line to the bracket for the rubber line to the rear axle. Just removed the U shaped line and straightened the rear line up and screwed it into the rear brake hose, bled it and tried it out, good brakes now. I guess the valve is GM's feeble attempt at anti lock brakes on trucks, but on my truck with the heavy load and air bag helper's it just was'nt working good for me.
