Question about 2004 Chevrolet TrailBlazer

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Abs comes on when coming to slow stop but does not put on an abs light and there are no codes!

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  • tigger4fun72
    tigger4fun72 Dec 18, 2012

    I too have the same problem no ABS lights or codes. Already took it to a mechanic and he ready did a scan on the system for brakes it doesnt throw any codes., Still having issues.



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There are no codes because as far as the system is concerned it is working properly. What's happening is this:

One of the abs speed sensors is detecting no movement on the wheel even though the wheel is still moving, a-bit very slowly. The other sensor(s) is detecting wheel movement properly. The system determines you are in a skid and engages the ABS/TC system. Crisis avoided as far as the PCM is concerned.

You'll need to get a scan tool that can read the ABS system and monitor the individual readings of the abs sensors as you are coming to a stop to identify which sensor needs to be replaced.

Or take it to your local automotive technician and they can diagnose and repair it for you.

Good luck!

Posted on May 25, 2011


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Have a tech read your codes
Have the ABS Control Module checked by a technician. If that is ok then make sure they look at the altenator
In my case, I was getting voltage spikes that were shorting out system controls -the ABS Control Module and the battery, etc. Once they put in a new altenator, the problem was fixed.

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