Operation CHARM
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GMC Truck
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2005
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Sierra 1500 2WD V6-4.3L VIN X
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Repair and Diagnosis
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Lighting and Horns
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Exterior Lighting Module
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Exterior Lighting Relay
Exterior Lighting Relay
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Emergency Vehicle Roof Lamp Relay (With RPO Code 5Y0)
Roof Beacon Relay (With RPO Code 5G4/TRW)
