Question about 2004 Pontiac Bonneville

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ABS Light stays on - 2004 - 2004 Pontiac Bonneville

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  • Pontiac Master
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Have the wheel speed sensors adjustment chk'd

Posted on Jun 03, 2009

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Posted on Jan 02, 2017

dgjtex
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SOURCE: abs light on, 2004 moutaineer

You most probably have a bad speed sensor on one wheel if it is intemitent try unpluging each on and repluging them, sometimes just a bad connector, If this doesn't help get someone to scan the codes for you and it will tell you which sensor is the problem. Keep in mind that until you fix this you can not depend on your ABS system. Normal braking should be fine though.

Posted on Dec 28, 2008

SOURCE: abs light is on? 2004 chevy avalanche

what i've seen with the k series chevrolet trucks is that the wheel speed sensors develop corrosion where the sensor mounts to the hub. you can start by taking the sensor out and cleaning off the mounting surface with a wire brush. the process is:

1. raise front of vehicle onto jackstands
2. remove front wheels
3. remove the brake caliper, bracket and rotor on both sides
4. remove wheel speed sensor via 1 torx bolt (be carefull as the corrosion will cause the sensor to "stick" in the hole)
5. clean the mating surfaces with a wire brush so the sensor bolt hole and mounting surface on the hub is shiney again.
6. if you can, pick up a can of rust preventing primer and spray a little on the surfaces to prevent further corrosion
7. let paint dry
8. apply a thin fil, of grease to the sensor and the sensor mounting spot on the hub
9. re-install sensor
10. revers steps 3-1 for re-installation.

*process is the same for both sides.

this was a common problem on the k series trucks.

while your in there it wouldn't be a bad idea to check the sensors wires to make sure they arent broken. let me know if the repair works for you

Posted on Feb 18, 2009

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