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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Control System - 4.3L (Troubleshooting & Diagnosis)) >> Troubleshooting >> Malfunction Indicator Lamp (MIL) Always On >> Circuit Description

Circuit Description

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Battery positive voltage is supplied directly to the malfunction indicator lamp (MIL). The powertrain control module (PCM) turns the MIL ON by grounding the MIL control circuit.

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