C0398 on the 2016 GMC Yukon
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| PIE0349A | 2021-09-07. Service bulletin. Engineering Information - Service 4WD Messange Displayed and DTC C0398 - Equipped with Switch activated transfer case (RPO NQH) |
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| PIE0349 | 2021-09-07. Service bulletin. Engineering Information - Service 4WD Messange Displayed and DTC C0398 - Equipped with Switch activated transfer case (RPO NQH) |
| PIE0349A | 2021-04-26. Service bulletin. Engineering Information – Service 4WD Message Displayed and DTC C0398 |
| PIE0349 | 2021-04-26. Service bulletin. Engineering Information – Service 4WD Message Displayed and DTC C0398 Condition Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this EI. Some customers may comment on a “Service 4WD” message displayed. During diagnosis a technician may find DTC C0398 (Range Actuator Position – Range Position Correlation). Cause GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be used to "root cause" the customer's concern and develop/validate a field fix. |
| GCUS-3-804 | 2018-04-02. Service bulletin. 28770 - SUB A ?Service 4WD? message may be displayed on the Driver Information Center and DTC C0398 may be set. Concurrently, the vehicle is permanently locked in 4HI and cannot be shifted shift out of it while the code is present. If the code is cleared, this scenario may repeat if the transfer case is in ?Auto? mode and driven for approx. 2 or more hours. Customers will likely notice that the steering wheel is harder to turn, the engine will feel like it has lost power and the tires may squeal when turning in a parking lot. Dealers are to reprogram the transfer case. |
| PIE-0362 | 2016-08-10. Service bulletin. THIS ENGINEERING INFORMATION BULLETIN IS REQUESTING INFORMATION FROM THE DEALERS ON A CUSTOMER CONCERN THAT A SERVICE 4WD MESSAGE DISPLAYED ON THE DIC AND DTC C0398 SET WITHIN THE TRANSFER CASE CONTROL MODULE. |
6 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.