GM Service Manual Online
For 1990-2009 cars only
Calibration ID: Displays the calibration ID for the instrument cluster.

Low Coolant Level: Displays OK and Low. The status of the discrete engine coolant level switch signal. The instrument cluster uses this input to determine display of the CHECK COOLANT LEVEL message on the DIC.

PROM ID: The PROM ID for the instrument cluster.

FC Relay 1 Command: The scan tool displays ON or OFF. This parameter indicates the PCM commanded state of the low speed cooling fans.

FC Relay 2 and S/P Command: The scan tool displays ON or OFF. This parameter indicates the PCM commanded state of the high speed cooling fans.