Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISELECTRICALGAUGESANALOG INSTRUMENT PANELSSYSTEM TESTSTEST Y: WATER-IN-FUEL INDICATOR ALWAYS ONTESTING
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M
Test Y: Water-In-Fuel Indicator Always On: Testing
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Testing
- If engine controls diagnostic system check diagnostic system check has been performed, go to next step. If IPC diagnostic system check has not been performed, go to ENGINE CONTROLS DIAGNOSTIC SYSTEM CHECK .
- Turn ignition switch to RUN position. If water-in-fuel indicator does not illuminate briefly, then go out, go to next step. If water-in-fuel indicator illuminates briefly, then go out, go to step 4 .
- If water-in-fuel indicator remains illuminated, go to step 5 . If water-in-fuel indicator never illuminates, go to TEST X: WATER-IN-FUEL INDICATOR INOPERATIVE .
- Operate vehicle under conditions which fault was noted. If system does not operate properly, go to step 2 . If system operates normally, problem may be intermittent. Try to recreate fault by wiggling wiring and connectors. Check for faulty connections at all connectors that may be causing intermittent condition.
- Disconnect water-in-fuel sensor 3-pin harness connector, located on left frame rail, near center of the vehicle. Turn ignition switch to RUN position. Using a test light connected to battery voltage, probe water-in-fuel sensor harness connector terminal "B" (Yellow/Black wire). See Figure . If test light illuminates, go to next step. If test light does not illuminate, go to step 7 .
- Repair short to ground in Yellow/Black wire between water-in-fuel sensor and IPC. After repair, go to step 8 .
- Replace water-in-fuel sensor. After repair, go to next step.
- Start engine. Operate vehicle under conditions which condition was noted. If system operates normally, system is okay at this time. If system does not operate properly, go to step 2 .
NOTE:
Before proceeding, drain any water from fuel system.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.