here goes on my 2000 2500 4x4 i blew the brake line that comes out of the proportioning valve and drops to the axle in the rear. easy fix so i thought! after getting all the needed parts and removing all the old line i attempted to put in the new in.. well some how the proportioning valve broke. the part were the line attaches snapped.. question is where is the cheapest place to find one or does anyone have a parts truck around. stealership says lke $425 WOW! do i need this part or what?

 

my mistake on part. its a height sensing valve. part no. 52009939aa