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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 678 (ENGINE CONTROLS - 4.3L - INTRODUCTION (2 OF 2))COMPONENT LOCATORENGINE CONTROLS CONNECTOR END VIEWSIDLE AIR CONTROL (IAC) VALVE
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Idle Air Control (IAC) Valve
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Idle Air Control (IAC) Valve
WARNING: This page is about a different car, the 2006 GMC Sierra and 2006 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Idle Air Control (IAC) Valve
Connector Part Information
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| Pin | Wire Color | Circuit No. | Function |
| A | L-GN/BK | 444 | IAC Coil B Low Control |
| B | L-GN/WH | 1749 | IAC Coil B High Control |
| C | L-BU/BK | 1748 | IAC Coil A Low Control |
| D | L-B/WH | 1747 | IAC Coil A High Control |
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.