Operation CHARM
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GMC Truck
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1984
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W Sprint/Caballero V6-231 3.8L
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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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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
Locations
Service and Repair
Computer Command Control (C-3) System
Engine Compartment Reference Diagrams
Diagrams
With VIN A
With VIN 9
Specifications
VIN A
VIN 9
Technical Service Bulletins
