2002 chevy avalance abs system

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jose6326

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May 5, 2014
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Chicago
im trying to help my dad fix his abs system
this is a 5.3l non 4x4

he had the brake pads and rotors replaced then one of the calipers went out as well and had that replaced

after the caliper was replaced im not sure if they bled the system correctly

when you press on the brake pedal it intermittently kicks the pedal back and the abs system kicks on.

I have no abs light on either

my dad took it to some alley mechanic to check the wheel sensors and he said they are fine

he said that the abs modulator might be defective
the mechanic disconnected the abs connector and the brakes work fine without it

I need to know if it is actually the abs modulator valve or abs computer or the whole system

also if I replace this unit when I bleed the brakes do I start from the furthest wheel from the unit and work my way up?

I want to fix this before the snow comes because my mom mostly drives this truck

thanks for any info
 

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