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Wiring diagrams Section: Testing & Diagnostics

Engine Controls Self-Diagnostics - 4.3L

Engine Control System Self-Diagnostics - 4.8L, 5.3L & 6.0L

Engine Control System Self-Diagnostics - 8.1L "C", "G" & "K" Series Trucks

Engine Controls - Strategy Based Engine Diagnosis

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Engine Controls - System & Component Testing: Maintenance Chevrolet Silverado 2500

Testing & Diagnostics

WATER-IN-FUEL DRAINING PROCEDURE (6.6L)

Disconnect negative battery cable(s). Install a hose to water drain on water-in-fuel sensor. Place other end of hose into an approved container. Drain as much fuel as possible from fuel filter housing. Tighten water drain on water-in-fuel sensor.