i have just unhooked the system (power cord) and works fine without the antilock kicking in ... it may just b a temporary fix but it has become kind of permanent to me , hehe.
the brake lines run thruy the system and act as a filter only pretty much as far as i know
btw ... it is a 94 GMC Jimmy SLE -- same parts as your truck with minor changes thru the years, but my truck was taken from older GMC and Chevy models of the truck and suv to create so lines and functions are probably the same
Remove your ABS Fuse to deactive your ABS system, your ABS light will light up on your dash. You can live with it one or you can pull the light bulb out from the dash.