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 1785 (ENGINE CONTROLS AND FUEL - 2.2L (L61) - INTRODUCTION (2 OF 2))COMPONENT LOCATORENGINE CONTROLS CONNECTOR END VIEWSIGNITION CONTROL MODULE (ICM)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Ignition Control Module (ICM)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Ignition Control Module (ICM)
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.
Ignition Control Module (ICM) Connector Parts Information
Connector Part Information
|
Ignition Control Module (ICM Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| A | PK | 39 | Ignition 1 Voltage |
| B | WH | 423 | IC Timing Control 1-4 |
| C-D | - | - | Not Used |
| E | BK/WH | 451 | Ground |
| F | BN/WH | 633 | Camshaft Position Sensor Signal |
| G | OG | 406 | IC Timing Control 2-3 |
| H-J | - | - | Not Used |
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.