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GMC
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1991
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Forward Control 5.7 K, Automatic
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Repair and Diagnosis
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Engine Performance
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Remove, Overhaul & Install
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Engine Controls - Remove/Install/Overhaul
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Electronic Spark Control (ESC) Module
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Notes
Electronic Spark Control (ESC) Module: Notes
NOTE:
The ESC is located on a bracket behind the distributor, mounted to firewall.