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1987
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R 2500 P/U 2WD L6-292 4.8L
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Relays and Modules - Computers and Control Systems
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Electronic Spark Control Module
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Testing and Inspection
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Electronic Spark Control Module: Testing and Inspection
Use the following procedures to diagnose ESC system malfunctions only. To diagnose general ignition system malfunctions, refer to ``High Energy Ignition (HEI) System Diagnosis.''