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Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On/Vehicle - In Service Mode
  2. Verify that no DTCs are set.
    • Go to next step: If no DTC is set
  3. Verify the component turns On and Off: Lane Departure Warning Indicator

    - Lane Departure Warning Switch

    • If the component does not turn On and Off

      Refer to: DTC B0987 

    • Go to next step: If the component turns On and Off
  4. All OK.
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