What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
C0398Equipped with Switch activated transfer case (RPO NQH)C0398Equipped with Switch activated transfer case (RPO NQH)C0398Range Actuator Position – Range Position CorrelationC0398Range Actuator Position – Range Position CorrelationManufacturer communications
22Original wording in English
CADILLAC, CHEVROLET, GMC
Reported code forms C0398
This Preliminary Information communication provides information to the technician about vehicles that may have a service 4 wheel drive message and the transfer case is stuck in neutral. Technician may find Diagnostic…
CADILLAC, CHEVROLET, GMC
Reported code forms C0398
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…
CHEVROLET, GMC
Reported code forms C0398
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.
CHEVROLET, GMC
Reported code forms C0398
Engineering Information - Service 4WD Messange Displayed and DTC C0398 - Equipped with Switch activated transfer case (RPO NQH)
CHEVROLET, GMC
Reported code forms C0398
Engineering Information - Service 4WD Messange Displayed and DTC C0398 - Equipped with Switch activated transfer case (RPO NQH)
CHEVROLET, GMC
Reported code forms C0398
Engineering Information – Service 4WD Message Displayed and DTC C0398
Check vehicle applicability
63A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Cadillac | ESCALADE | 2016 |
| Cadillac | ESCALADE | 2015 |
| Cadillac | ESCALADE ESV | 2015 |
| Chevrolet | AVALANCHE | 2013 |
| Chevrolet | AVALANCHE | 2012 |
| Chevrolet | COLORADO | 2015 |
| Chevrolet | SILVERADO | 2015 |
| Chevrolet | SILVERADO | 2013 |
| Chevrolet | SILVERADO 1500 | 2016 |
| Chevrolet | SILVERADO 1500 | 2015 |
| Chevrolet | SILVERADO 1500 | 2014 |
| Chevrolet | SILVERADO 2500 | 2016 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.