ABS stays on a 2001 GMC Jimmy - 2001 GMC Jimmy

If the ABS light stays on all the time, your Antilock Brake System (ABS) is malfunctioning. The most common problems on GM vehicles are failed wheel speed sensors and/or wheel bearing assemblies. Your vehicle is equipped with 2 wheel speed sensors for the front wheels and uses the signal from the Vehicle Speed Sensor (VSS) for the rear wheels. There are several other possible causes as well. You must scan the Antilock Brake Control Module to find out why the light is on, then diagnose the fault accordingly.

This is a common issue, and is pretty easy to fix. There are ABS sensors on the wheels, and you have a bad one. Usually the wires become corroded, and are easy to spot. The unit is on the back side of the wheel assembly.

The ABS light is on because you have a code stored in your ABS module. It is a good idea to bring it to a shop that has an ABS scanner to determine the problem. They can tell you precisely which wheel sensor is bad or which ABS component is faulty. There is one wheel sensor at each wheel, directly over the exciter ring at each hub. If you want to scan the code yourself, you will need a Ford Super Star II tester or an equivalent scan tool to access the ABS system. Take a look at the front and rear ABS notched rotors, and make sure they are not caked up with debris, oil or dirt because the sensors read these notches.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514