Operation CHARM
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GMC Truck
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1982
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S15,T15 P/U-Jimmy L4-119 1.9L
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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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Technical Service Bulletins
Engine Control Module: Technical Service Bulletins
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Engine - THIS BULLETIN HAS BEEN CANCELED
Engine Controls - ECM May Contain Wrong PROM
ECM - Revised Replacement Procedure