[SoCal LS-L]

Originally Posted by StelthSvx

there are two bleeder valves on top of abs unit, what else would you have to bleed, why is it pita???? ( i need to do this haven't yet)

I have done a few.... any time you work on anything besides the calipers/wheel cylinders, such as an ABS unit or a master cylinder, you have to bleed EVERYTHING, since you have introduced air into the entire system. The air has to be bled from the replaced part, and every point downstream of the repair. The tinyest bit of air bubbles inside an ABS unit will cause a complete clusterbleep of brake troubles.