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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.
  1. Repair any brake system related DTCs before performing this diagnostic.
  2. Verify that DTC P0572 or P0573 is not set as current.
    • If the brake system or brake lights do not operate properly, refer to DTC P0572 or P0573 .
  3. Verify that DTC P0703 is not set.
    • If DTC P0703 is set as current, replace the BCM. Clear the DTC and road test the vehicle. If DTC P0703 resets, replace the ECM.
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