86 GMC Sierra Classic 2500 questions

[dieseldawg142]

Originally Posted by gmcnoob

The fitting at this junction is much larger.

that is a rudimentary ABS system. designed to prevent wheel lock-up with a empty or lite load. just by pass it so you only have one size fitting. there notorious for jamming, hanging up, etc. i got rid of mine & the brakes feel a lot better.

[gmcnoob]

Originally Posted by dieseldawg142

that is a rudimentary ABS system. designed to prevent wheel lock-up with a empty or lite load. just by pass it so you only have one size fitting. there notorious for jamming, hanging up, etc. i got rid of mine & the brakes feel a lot better.

You were absolutely right. I bypassed it and now the rear brakes work perfectly.I just wish I had known that before wasting several hours on it.