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 1851 (LIGHTING SYSTEM)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 B1395 | B1395 03: Device Voltage Reference Output 1 Circuit Voltage Below Threshold B1395 07: Device Voltage Reference Output 1 Circuit Voltage Above Threshold |
| DTC B1480 | B1480 00: Battery Rundown Protection Circuit |
| DTC B2545 | B2545 00: Backup Lamps Circuit |
| DTC B2575 | B2575 00: Headlamp Low Beam Control Circuit |
| DTC B257A | B257A 00: Headlamp Switch Input Signals Mismatch |
| DTC B2580 | B2580 00: Headlamp High Beam Control Circuit |
| DTC B2585 | B2585 00: Park Lamp Control Circuit |
| DTC B2600 | B2600 00: Daytime Running Lamp Control Circuit |
| DTC B2625 | B2625 00: Passenger Compartment Dimming Request Signal Circuit Voltage Below Threshold |
| DTC B2645 | B2645 03: Ambient Light Sensor Circuit Below Threshold B2645 07: Ambient Light Sensor Circuit Above Threshold |
| DTC B2652 | B2652 00: Passenger Compartment Dimming 3 |
| DTC B3445 | B3445 00: Stop Lamp Circuit |
| DTC B3600 | B3600 03: Passenger Compartment Dimming Request Signal Circuit Voltage Below Threshold |
RENDER: 1.0x
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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.