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 1844 (DTC INDEX)ENGINE ELECTRICAL DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Engine Electrical DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Engine Electrical DTCS
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE ELECTRICAL DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | DEFINITION |
|---|---|
| DTC B1325 | Device Power 1 Circuit |
| DTC B1327 | Device Power 1 Circuit Low |
| DTC B1328 | Device Power 1 Circuit High |
| DTC P0562 | System Voltage Low |
| DTC P0563 | System Voltage High |
| DTC P0621 | Generator L-Terminal Circuit |
| DTC P0622 | Generator F-Terminal Circuit |
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.