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Buick
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1991
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Roadmaster V8-305 5.0L
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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Manufacturer Code Charts
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DTC 21
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Antilock Braking System (ABS)
Antilock Braking System (ABS)
Fig. Code 21, RF Wheel Speed Sensor (Sensor Fault). Caprice, Custom Cruiser & Roadmaster.:
