Circuit/System Testing

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.
Verify that DTC U0121, U2099, C0035, C0040, C0045, or C0050 is not set.
- If any of the DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If none of the listed DTCs are set
Replace the K17 Electronic Brake Control Module.
Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
- If the DTC sets
  Replace the module that set the DTC.
- Go to next step: If the DTC does not set
All OK.