Operation CHARM
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GMC Truck
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1989
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R 2500 P/U 2WD L6-292 4.8L
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Repair and Diagnosis
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Relays and Modules
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Relays and Modules - Powertrain Management
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Relays and Modules - Computers and Control Systems
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Engine Control Module
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Locations
Engine Control Module: Locations
RH Side Of Engine.:
RH Rear Of Engine Compartment
Applicable to: R & V Series w/V8-454/7.4L TBI Engine