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

PROM ID: Displays the PROM ID for the control module.

Washer Fluid Level: Displays Off or On. The status of the discrete washer fluid level switch signal. The instrument cluster uses this input to determine display of the CHECK WASHER FLUID message on the DIC.