Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1916 (TRANSFER CASE - GETRAG 760)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Diagnostic Code Index
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC C0393 | C0393 06: Rear Axle Coupling Solenoid Control Circuit Short to Ground or Open/High Resistance C0393 0B: Rear Axle Coupling Solenoid Control Circuit Current Above Threshold |
| DTC C0394 | C0394 06: Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open |
| DTC C0550 | C0550 00: Electronic Control Unit (ECU) Performance |
| DTC C0558 | C0558: Calibration Data Not Programmed |
| DTC C0561 | C0561 71: System Disabled Information Stored Invalid Serial Data Received |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.