Sierra left side brakes locking up

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01-28-2013, 07:57 AM

#11

jwfirebird

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only other thing i can think of and its a guess, is some cars have anti drainback devices in the lines they might have an issue

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01-29-2013, 02:57 PM

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Ol"_Rusty

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i was thinking maybe a bad booster, maybe a master cylinder or a poportioning valve

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01-29-2013, 07:47 PM

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rjblazer

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The master cylinder separtes them: Im pretty sure the brakes are front and rear separted so it would not affect one side. The porpotioning valve is internal to the abs motor.

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01-30-2013, 06:37 PM

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Ol"_Rusty

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i just cant figure anything else out. It sucks cause the truck will sit for a little bit and once the pressure goes down theyre fine until it builds enough pressure again

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02-05-2013, 09:30 PM

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Ol"_Rusty

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anyone?

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02-06-2013, 07:23 AM

#16

rjblazer

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Did you try pulling the abs fuse and see if it makes a difference?

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02-06-2013, 07:45 AM

#17

Ol"_Rusty

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no i did not, thats a good idea

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02-06-2013, 11:09 AM

#18

Ol"_Rusty

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i unbolted my master today after the pressure built up and that didnt make a difference, so then I tried the abs fuse, still noting. I'm stuck at this point

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