buick Workshop Repair Guides

Buick Workshop Service and Repair Manuals

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Diagnostic Chart

Wiring Diagram

Diagnosis

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The following tables will diagnose the oil pressure switch and the coolant level switch circuits.

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For diagnosis of the Instrument Panel Cluster (IPC), refer to Instrument Panel, Gauges and Warning Indicators.

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For PCM replacement information, refer to PCM/EEPROM Replacement/Programming.

Circuit Description

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