Water in Fuel
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
The WATER IN FUEL indicator illuminates in the IPC when the water in fuel sensor detects water in the fuel tank. The water in fuel sensor provides a ground to the water in fuel indicator control circuit in order to illuminate the WATER IN FUEL indicator.