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Diagnostic Aids

WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Check for proper Idle Air Control (IAC) operation. See IDLE AIR CONTROL SYSTEM DIAGNOSIS under MODULES, MOTORS, RELAYS & SOLENOIDS in SYSTEM & COMPONENT TESTING - 2.2L SONOMA & S10 PICKUP article. Check for intermittent conditions.

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