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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 harness connector at the BCM.
  2. Verify there are not any aftermarket components wired into terminal 5.
  3. If terminal 5 is empty, clear the code as there are not any further circuits to diagnose.