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 78 (ELECTRICAL COMPONENT LOCATOR)CONTROL UNITS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Control Units
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Control Units
WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Body Control Module (BCM) | Below right side of dash, near blower motor. See Figure. |
| Brake Pressure Modulator Valve (BPMV) | At lower left front of engine compartment. |
| Cruise Control Module (CCM) | On right side of engine compartment. See Figure. |
| Electronic Brake Control Module (EBCM) | Inside left front fender. |
| Ignition Control Module (ICM) | On top right side of engine. See Figure. |
| I/P Dimmer Module | On left side of dash. |
| Powertrain Control Module (PCM) | Below left side of dash, near steering column. See Figure. |
| Remote Control Door Lock Receiver (RCDLR) | On rear package shelf. |
| Sensing & Diagnostic Module (SDM) | Under right front seat. |
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.