# C0398 on the 2016 GMC Yukon XL

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.

## Bulletins for this model year that name C0398

- [10201135](https://open.wenmarpro.com/bulletins/10201135), 2021-09-07: Engineering Information \- Service 4WD Messange Displayed and DTC C0398 \- Equipped with Switch activated transfer case \(RPO NQH\)
- [10201134](https://open.wenmarpro.com/bulletins/10201134), 2021-09-07: Engineering Information \- Service 4WD Messange Displayed and DTC C0398 \- Equipped with Switch activated transfer case \(RPO NQH\)
- [10190929](https://open.wenmarpro.com/bulletins/10190929), 2021-04-26: Engineering Information – Service 4WD Message Displayed and DTC C0398
- [10190925](https://open.wenmarpro.com/bulletins/10190925), 2021-04-26: 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.
- [10078562](https://open.wenmarpro.com/bulletins/10078562), 2016-08-10: 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.