1995 GMC Yukon Owner's Manual - Page 288

If this happens, a WATER IN FUEL light will come on. If it does, the excess water must be drained. Your dealer can show you how to do this. This light also should come on briefly when you start your engine, as a check. If it doesn't, have it fixed so it will be there to let you know if you ever do get water in your fuel. WATER IN FUEL If the light comes on at any other time. use this chart. NOTICE: If you drive when this warning light on, you can damage your is fuel injection systemand your engine. If the light comes on right after you refuel, it means water was pumped into your fuel tank. Turn off your engine immediately. Then, have the water drained a t once. "WATER IN FUEL" LIGHT CHART Problem Light comes on intermittently. Light stays on: Recommended Action Drain water from fuel filter. Drainfuel filter immediately. If no water can be drained and light stays on. see your dealer for assistance. Drainfuel filter immediately. If no water can be drained-water may be frozen. Open the air bleed valve to check for fuel pressure. If no fuel pressure is present, replace the fuel fi 1ter. Fuel tank purging required. See your dealer for assistance. I . At temperatures above freezing. 2. At temperatures below freezing. 3. Imtnediately after refueling large amount of water possibly pumped into fuel tank. 6-6