Operation CHARM
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GMC Truck
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1984
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G 3500 1 Ton Van L6-250 4.1L VIN D 2-bbl
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Relays and Modules - Computers and Control Systems
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Engine Control Module
Engine Control Module
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Description and Operation
"E" Cell
Electronic Spark Timing (EST)
General System Description
Trouble Code Memory
Testing and Inspection
Chart C-1 ECM Replacement Check
Checking Control Module For Bad Solder Joints
Locations
Service and Repair
Diagrams
Specifications
Technical Service Bulletins
