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
2Original wording in English
ISUZU
SERVICE 4WD LIGHT ON, 4WD INOPERATIVE, DIAGNOSTIC TROUBLE CODES (DTC) C0300 AND/OR C0305. *TT
CHEVROLET, GMC, OLDSMOBILE
SERVICE 4WD LIGHT ON, 4WD INOPERATIVE, DIAGNOSTIC TROUBLE CODES C0300 AND/OR C0305 SET. *TT
Check vehicle applicability
9A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | SILVERADO ↗ | 2003 |
| Chevrolet | SUBURBAN ↗ | 2003 |
| Chevrolet | TAHOE ↗ | 2003 |
| Chevrolet | TRAILBLAZER ↗ | 2003 |
| GMC | ENVOY ↗ | 2003 |
| GMC | SIERRA ↗ | 2003 |
| GMC | YUKON ↗ | 2003 |
| Isuzu | ASCENDER ↗ | 2003 |
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.