Brakes????

GavinJansma · Sep 24, 2022

I replaced all the front brake lines on a 1990 k1500 including the abs unit small lines I've been able to get fluid to both front calibers but is very slow on both sides... 2 lines in the back of the truck on the second line for the rear are broke and leak a crap ton but I need just the fronts for tomorrow when I go to work, how can I get the fronts to work good enough. I'm guessing there's air inside the abs unit and I can't figure out how to bleed it...

1997 · Sep 24, 2022

gotta fix the back brakes before you can bleed properly.
i did the oposite, replaced rear line, had to bleed all 4 wheels to get things working.

PlayingWithTBI · Sep 24, 2022

GavinJansma said:
2 lines in the back of the truck on the second line for the rear are broke and leak a crap ton but I need just the fronts for tomorrow when I go to work,

Call UBER, park it until you can get it right, before someone gets hurt!

GavinJansma · Sep 24, 2022

1997 said:
gotta fix the back brakes before you can bleed properly.
i did the oposite, replaced rear line, had to bleed all 4 wheels to get things working.

Alright that's what I figured

Schurkey · Sep 25, 2022

HOW are you bleeding the front brakes? Power bleeder? Vacuum? Gravity? Two-man pump-the-pedal? Something else?

'90 should have Rear Wheel Anti-Lock (RWAL) ABS. The '88 and '89 trucks have a cast-iron RWAL unit with a bleeder valve. At some point they switched to an aluminum-body RWAL unit that has no bleeder valve. I downloaded the '94 service manual, that aluminum RWAL unit needs a scan tool to bleed. Perhaps yours does, too. But in any event, the RWAL has ZERO effect on the front brakes.

Brakes????

GavinJansma

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1997

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PlayingWithTBI

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