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 MANUALSCHEVROLET1995SPORTVAN G20, 6.5 PREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 17 (ENGINE CONTROLS - REMOVE/INSTALL/OVERHAUL - 7.4L)FUEL SYSTEMIDLE AIR CONTROL (IAC) VALVEINSTALLATION
1995 Chevrolet Sportvan G20, 6.5 P
Idle Air Control (IAC) Valve: Installation
1995 Chevrolet Sportvan G20, 6.5 PSECTION Installation
WARNING: This page is about a different variant/trim than selected.
- Inspect gasket for damage. Replace if necessary. Measure distance between tip of IAC valve pintle and mounting flange. Distance should not exceed 1 1/8" (28 mm). If valve is extended too far, damage to valve will result during installation.
- To set IAC valve pintle length on new IAC valve, use finger pressure to slowly retract pintle. Install NEW gasket. Install IAC valve on throttle body. Tighten IAC valve to specification. See TORQUE SPECIFICATIONS .CAUTION: DO NOT manually extend or retract pintle if IAC valve has been in service, or damage to worm gear will result.
- Connect IAC valve harness connector and install air cleaner. Start engine and allow it to reach normal operating temperature. Drive vehicle. It may be necessary to reset idle speed. To reset, disconnect negative battery cable for 10 seconds and reconnect. Cycle ignition on with engine off for 5 seconds. Turn ignition off for 10 seconds and restart vehicle. Proper idle will be initialized.
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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.