Operation CHARM
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GMC Truck
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1997
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S15/T15 Sonoma P/U 2WD V6-4.3L VIN W
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Repair and Diagnosis
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Lighting and Horns
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Backup Lamp
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Testing and Inspection
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Diagnostic Charts
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Backup Lamps Always ON
Backup Lamps Always ON
Backup Lamps On At All Times:
