Common Causes:
* Faulty ABS Module: This is the "brain" of the ABS system. A malfunctioning module can cause the pump to run constantly and trigger the ABS light.
* Low Brake Fluid: The ABS system uses brake fluid, and low levels can cause the pump to run and the light to turn on. Check your brake fluid level.
* Faulty Wheel Speed Sensor: These sensors monitor wheel speed and send data to the ABS module. A faulty sensor can cause the pump to run and the light to illuminate.
* Wiring Issues: Electrical problems in the ABS system's wiring can also cause the pump to malfunction.
* Stuck ABS Valve: The ABS valve can get stuck open, causing the pump to run continuously.
* Contaminated Brake Fluid: Dirty brake fluid can affect the ABS system's performance.
What to do:
1. Check your brake fluid level: If it's low, top it off with the correct type of fluid. However, if it's significantly low, this could indicate a leak, which needs to be addressed.
2. Have the system scanned: A mechanic can use a scan tool to read any error codes stored in the ABS module. These codes can provide valuable clues to the problem's source.
3. Inspect the wiring: Look for any signs of damage, corrosion, or loose connections in the ABS wiring.
4. Seek professional help: If you're not comfortable troubleshooting electrical systems, take your Tahoe to a qualified mechanic for diagnosis and repair.
Important Note: Never ignore a warning light, especially one related to your vehicle's braking system. A faulty ABS system can significantly affect your braking performance, especially in emergency situations.
