How to Troubleshoot a GMC ABS Brake System
The ABS brake system is designed to keep your vehicle break system from locking up, especially in bad whether conditions. Regular maintenance and service is required to ensure the best performance of your GMC brake system. If you are having problems with your GMC ABS brake system you can troubleshoot to determine what the problem may be.
Things you will need:
- Flashlight
- Fuse (optional)
- Open the fuse panel underneath the dash to check the fuse for the ABS break system. Check to see if there is a lever to remove the fuse panel. Locate the fuse in your GMC that is located for the ABS brake system and remove it with the fuse puller. Inspect the fuse to make sure that it is not blow. Replace the fuse if necessary.
- Turn the steering wheel to the right to check the wires behind the wheels. Use a flashlight to make sure the ABS wires are still connected and not damaged. The ABS wires are the ones running the wheel hub assembly behind the tires.
- Turn the GMC ignition on to the "ll" position. Check the ABS light on the dash. If the ABS light is on and stays on, the ABS system should be checked for possible failure to the ABS sensor.
- Check the depth of the brake pad lining. To prevent from removing the wheel on your GMC, look through the spokes of the wheel. The break pad should be al least 1/4 to 1/8 of an inch thick. Replace the pads as soon as possible if they are not thick enough.
- Check the brake rotors on your GMC for score marks. Most times you do get a warning if your breaks or rotors are bad because you will hear a squealing sound near the wheels. If there are deep score marks this usually can indicate the brake pad where is uneven. If this is the case the brake pads and rotors might both have to be replaced.