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Home >> GMC >> 1998 >> Forward Control 6.5 F >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Controls - System & Component Testing - 7.4L) >> Ignition System >> Timing Control Systems >> Ignition Control Circuit

Ignition Control Circuit

WARNING: This page is about a different variant/trim than selected.

An open or short to ground in Ignition Control (IC) or by-pass circuit will cause PCM/VCM to turn on Malfunction Indicator Light (MIL) and confirm fault by setting a related trouble code. See TESTS W/CODES - 7.4L article.

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