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Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON/Vehicle In Service Mode.
  2. Verify DTC C056D is not set.
    • If DTC C056D is set 

      Replace the device that sets the DTC.

    • Go to next step: If DTC C056D is not set 
  3. All OK
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