Selecting "DISPLAY VIN?"
WARNING: This page is about a different car, the 1990 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.
Selection of the "DISPLAY VIN?" test type in the BCM system level will result in a blank display for a short period followed by a display of the vehicle identification number (VIN) as stored in the BCM EEPROM. While the VIN is displayed, depressing the "OFF" button on the ECC panel will return the display to the next available test type selection.