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Home >> GMC >> 1990 >> Forward Control 6.2 J, Automatic, 3L80/M40 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Electronic Spark Control (ESC) Module >> Engine Controls - Remove/Install/Overhaul >> Removal & Installation
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Removal & Installation

Turn ignition off. Remove screws holding bracket to firewall. Rotate bracket to access ESC module. Disconnect ESC module harness connector. Remove ESC mounting screws and remove ESC. To install, reverse removal procedure.

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