WATER IN FUEL (Diesel)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 GMC Savana Special, 2001 GMC Savana Camper Special, 2001 GMC Savana, 2001 Chevrolet RV Cutaway, and 2001 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
IPC illuminates WATER IN FUEL indicator when PCM requests illumination via a hard wired input to IPC. If indicator remains on at any time, excessive water in fuel/water separator filter is indicated. Service fuel/water separator filter immediately.