Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify that no other DTCs are set except for C0242.
- If any other DTCs are set
Refer to the Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no other DTCs are set
- If any other DTCs are set
- Replace the K20 Engine Control Module.
- Verify that DTC C0242 does not set while operating the vehicle within the Conditions for Running the DTC.
- If DTC sets
Replace the K17 Electronic Brake Control Module.
- Go to next step: If DTC does not set
- If DTC sets
- All OK.