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Home >> Chevrolet >> 2004 >> Avalanche 2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Control System - 4.8L, 5.3L & 6.0L (Troubleshooting & Diagnosis)) >> Diagnostic Information and Procedures >> Malfunction Indicator Lamp (MIL) Inoperative >> Circuit Description

Circuit Description

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Ignition voltage is supplied to the malfunction indicator lamp (MIL). The powertrain control module (PCM) turns the MIL ON by grounding the MIL control circuit. There should be a steady MIL with the ignition ON and the engine OFF.

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