Chevrolet Silverado 1500 / 2500 / 3500:

brake light on abs light on

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# 1  1/18/2012 1:40 AM

New member
Registered: 1/18/2012
Posts: 3

brake light on abs light on

Scanned truck and got C0550 code.



# 2  1/18/2012 1:29 PM

Registered: 11/24/2009
Posts: 1301

Re: brake light on abs light on

In the future we need more detailed information on your vehicle like the year, make, model, engine size, detailed description of the problem you are having and what ever you can give us so we can help you the best way we can

CO550 is a Anti lock brake malfunction. If you don't have proper training in this category then you should bring the truck into a professional mechanic or Chevy dealer. There are special procedures to follow to properly diagnosis this problem. The one I listed below is only part of the long list of tests to be done.

Circuit Description of code CO550 is below:

The EBCM performs several self-tests for any internal problems which may affect proper operation.

Conditions for Running the DTC

The ignition is ON.
The engine is running at a rate greater than 450 RPM.
Conditions for Setting the DTC
The EBCM detects an internal malfunction.

Action Taken When the DTC Sets
The following actions may occur.

The EBCM disables the ABS/DRP.
The ABS indicator turns ON.
The brake warning indicator turns ON.
Conditions for Clearing the DTC
Certain failures that may cause this DTC to set cannot be cleared. Other failures that may cause this DTC to set may be cleared, at least temporarily, by using the scan tool Clear DTCs function.

Diagnostic Aids
Replace the EBCM if this DTC continues to set intermittently.
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