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Home › GMC › 1995 › Forward Control 4.3 Z, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - Basic Diagnostic Procedures - 4.3L › C-4, Basic Ignition System Checks › Enhanced/High Value Ignition System (OBD-II) › Notes

Enhanced/High Value Ignition System (OBD-II): Notes

NOTE: This system is used on "S" and "T" Series with 4.3L engine equipped with VCM-A controller. Timing is not adjustable on this system.
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