Reference meaning
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.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.
Scan worksheet →Manufacturer communications
3Original wording in English
CHEVROLET, GMC
This Preliminary Information communication provides information to the technician about vehicles that have a service 4 wheel drive message displayed in the driver?s information center. Technician will find Diagnostic Trouble Code C0306, C0321, C0398, C0396, and C0569. Technician should inspect the terminal at X109 and X3 for pro…
CHEVROLET, GMC
This Preliminary Information communication provides information to the technician about vehicles that have a service 4 wheel drive message displayed in the driver's information center. Technician will find Diagnostic Trouble Code C0306, C0321, C0387, C0398, C0396, and C0569. Technician should inspect the terminal at X109 and X3 …
CHEVROLET, GMC
This Preliminary Information communication provides information to the technician about vehicles that have a service 4 wheel drive message displayed in the driver's information center. Technician will find Diagnostic Trouble Code C0306, C0321, C0387, C0398, C0396, and C0569. Technician should inspect the terminals at connectors …
Check vehicle applicability
23A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | AVALANCHE ↗ | 2013 |
| Chevrolet | AVALANCHE ↗ | 2012 |
| Chevrolet | SILVERADO ↗ | 2013 |
| Chevrolet | SILVERADO 2500 ↗ | 2013 |
| Chevrolet | SILVERADO 2500 ↗ | 2012 |
| Chevrolet | SILVERADO 3500 ↗ | 2013 |
| Chevrolet | SUBURBAN ↗ | 2013 |
| Chevrolet | SUBURBAN ↗ | 2012 |
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.