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 1078 (BODY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC TROUBLE CODE (DTC) LIST
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Diagnostic Trouble Code (DTC) List
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Diagnostic Trouble Code (DTC) List
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Trouble Code (DTC) List
| DTC | Diagnostic Procedure | Module(s) |
|---|---|---|
| B0008 | DTC B0008 | BCM |
| B1000 | DTC B1000 | BCM, DRR, Radio, SDM, HVAC, HUD, IPC, EBCM, MSM, PCM, RSE, VCIM, VTD |
| B1004 | DTC B1004 | DRR, Radio, RSE, VCIM, VTD |
| B1007 | DTC B1007 | DRR, Radio, RSE, VCIM, VTD |
| B1009 | DTC B1009 | DRR, Radio, RSE, VCIM, VTD |
| B1440 | DTC B1440 | BCM |
| B1507 | DTC B1507 or B1508 | BCM |
| B1508 | DTC B1507 or B1508 | BCM |
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.