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First you need to have EBCM - electronic brake control module check for DTC'S - diagnostic trouble code's . If the light is on there is a code stored . I think most part stores can do this and for free . After you find out what code is stored , looking up that code in service repair information for diagnostic trouble shooting chart would be next step . There are a few codes too.
DTC C0035 or C0040
DTC C0045 or C0050
DTC C0110
DTC C0131
DTC C0161
DTC C0186
DTC C0196
DTC C0201
DTC C0240
DTC C0241 or P0856
DTC C0244 or P1689
DTC C0245
DTC C0283
DTC C0287
DTC C0290 or C0292
DTC C0455
DTC C0550
DTC C0558
Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription .
• DTC C0035 Left Front Wheel Speed Sensor Circuit
• DTC C0040 Right Front Wheel Speed Sensor Circuit
It sounds like you have a bad wheel-speed sensor and the ABS computer is thinking a wheel is locking up when you try to stop and engaging your ABS system.
Yes this seems like a problem for chevy lately.You might be getting on the brake too hard or could be your abs sensor.I disabled my abs and shi* stops on a dime.
Most likely one of your ABS sensors are dirty or the wire has corroded. Common for the sensors to get dirty since there magnetic and a simple cleaning will fix this. The ABS sensors are on each wheel on the inner side and can be cleaned with brake parts cleaner. If there was rust from the rotor or dirty that got in between the speed ring and sensor, you most likely have to replace the sensor.
Start with cleaning and inspecting the sensors, it my just be dirt build up and the sensor needing realignment which is a quick fix. After that and you still have the ABS light on, one of your sensors have gone bad. Go to Auto Zone and buy the brake parts cleaner and have them scan your trailblazer for which ABS component when bad to help address which sensor it is and yes they scan free of charge.
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When the ABS light is on when driving there is a problem in the anti lock brake system and you will need to have it tested to find out what the problem is. As long as the light is on the ABS has been shut off by the computer until it is repaired. There could be problems with one of the wheel speed sensors, wiring or the ABS pump. On some vehicles the red brake light will come on too.
have autozone scan it for free could be multiple things wrong wheel speed sensors to abs pump does it come right on after starting? or do you have to drive it???
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