Operation CHARM
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GMC Truck
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1991
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R 3500 P/U 2WD V8-454 7.4L
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Repair and Diagnosis
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Brakes and Traction Control
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Antilock Brakes / Traction Control Systems
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Testing and Inspection
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Component Tests and General Diagnostics
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Brake Light Flashing
Brake Light Flashing
Fig. 17 Brake Light Flashing. 1989-91 G & R/V Models:
