Rick's Free Auto Repair Advice

ABS light on dash GM vehicles

My ABS light is on GM vehicles

If you have an ABS light on dash in your GM vehicle, don’t automatically assume it’s a major problem. Head right to the high mount stop light and see if it lights up when you step on the brake pedal. If it doesn’t light up, replace the bulb and restest.

The Electronic Brake Control Module looks for a voltage drop at the high mount stop light. If it sees the drop, the system determines that the circuit is OK. If it doesn’t see the voltage drop, it disables the ABS system and turns on the ABS light.

It’s a pretty easy fix that doesn’t require a scan tool.

©, 2015 Rick Muscoplat

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Check the bulb in the high mount stop light before doing anything else on a GM vehicle with the ABS on dash

Posted on by Rick Muscoplat


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