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 1858 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION 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 B0000 | B0000 5A: Vehicle Speed Information Circuit Plausibility Failure |
| DTC B1025, B1035, B1045, or B1055 | B1025 01: Audio Output 1 Left Front Circuit Short to Battery B1025 02: Audio Output 1 Left Front Circuit Short to Ground B1035 01: Audio Output 2 Right Front Circuit Short to Battery B1035 02: Audio Output 2 Right Front Circuit Short to Ground B1045 01: Audio Output 3 Left Rear Circuit Short to Battery B1045 02: Audio Output 3 Left Rear Circuit Short to Ground B1055 01: Audio Output 4 Right Rear Circuit Short to Battery B1055 02: Audio Output 4 Right Rear Circuit Short to Ground |
| DTC B1259 | B1259 02: Antenna Ground Circuit Short to Ground B1259 05: Antenna Ground Circuit Short to Battery or Open |
| DTC B1287 | B1287 01: Amplifier Control Signal Circuit Short to Battery B1287 02: Amplifier Control Signal Circuit Short to Ground B1287 04: Amplifier Control Signal Open Circuit |
| DTC B1446 or B1447 | B1446 03: Replace Backup Power Source Voltage Below Threshold B1447 04: Backup Power Source Open Circuit |
| DTC B2455 | B2455 04: Cellular Phone Microphone Circuit Malfunction Open Circuit |
| DTC B2462 (Navigation Radio) | B2462 02: Global Positioning System (GPS) Short to Ground B2462 04: Global Positioning System (GPS) Open Circuit |
| DTC B2462 (Communication Interface Module) | B2462 02: Global Positioning System (GPS) Signal Short to Ground B2462 04: Global Positioning System (GPS) Signal Open Circuit |
| DTC B2470 | B2470 04: Cellular Phone Antenna Circuit Malfunction Open Circuit |
| DTC B2474 | B2474 07: Navigation Display Head Backlighting Performance |
| DTC B2476 or B2482 | B2476 00: Cellular Phone Select Service Switch B2482 00: Cellular Phone Select Service Switch Range/Performance |
| DTC B2485 | B2485 02: Wireless Communication Antenna Circuit (Bluetooth) Short to Ground B2485 04: Wireless Communication Antenna Circuit (Bluetooth) Open 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.