Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Monitor the ABS DTCs on the scan tool.

If any ABS DTCs are set, diagnose those first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
If there are no ABS DTCs set, refer to Symptoms - Antilock Brake System under 3900kg (8600lbs) GVW, or Symptoms - Antilock Brake System over 3900kg (8600lbs) GVW.