Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 GMC Yukon XL, 2016 GMC Yukon, 2016 Chevrolet Tahoe, 2016 Chevrolet Suburban, and 2016 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 .
- If no 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.
- If DTC does not set
All OK.