Circuit/System Verification

WARNING: This page is about a different car, the 2018 Buick Envision. However, it is still accessible from the selected car via links, so may be relevant.

Ignition - On/Vehicle - In Service Mode
Verify that no DTCs are set.
- If any DTC is set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If no DTC is set
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
All OK.