Oil Pressure/Choke Indicator

If indicator lamp does not light, first check gauges fuse. Replace fuse if needed. If oil pressure/choke indicator light does not go off after engine is started, check voltage at oil pressure switch.
On Ciera V6 models, there should be battery voltage at Tan wire, with engine running. If there is adequate oil level and oil pressure, and no voltage to Tan wire, replace oil pressure switch.
On Calais V8 models, there should be no voltage at Tan wire with engine running at fast idle. If oil level and oil pressure are okay, and battery voltage is present at Tan wire, replace oil pressure switch.
If oil pressure/choke indicator does not light with ignition switch in "RUN" position and bulb is okay, check (on Ciera V6 models) for an open choke heater.
On Calais V8 models, ensure oil pressure switch is closed when engine is off. If there is battery voltage at Tan wire to switch, install a new oil pressure switch.