Ok not sure if this is the right place to post but figured i would give it a shot here.. i got a 2001 chevy express cutaway van with a 6.5 and the brake system was empty due to a blown brake line. i have replaced every line on the truck bled the system and they all work but my pedal is soft and the brake light is on. when i unplug the ABS system the lights come on as they should.. someone said that either the brake booster or the master cyclinder is bad because the system sat for over a year without brake fluid in the system. i also replaced the rear wheel cyclinders and the calipers so with the exception of the master cyclinder brake booster and abs modual everything is new..