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Circuit/System Verification

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.
IMPORTANT: When using this diagnostic, more than one vehicle key is required to ensure proper diagnosis. If more than one key is not available at the time of service, contact the customer and ask if any other keys can be provided for service. If unavailable, a new second key can be created.
  1. Perform the 10-Minute Vehicle Key Relearn procedure. Refer to Replacing Keys (North America except Canada)  or Replacing Keys (Canada) .
  2. While viewing the scan tool BCM VTD States parameter, turn ON the ignition with each of the available vehicle keys. The parameter should read Valid Key Code with all available keys.
    • If not the specified value, replace the affected key.
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