Silverado 3500 2WD V8-6.6L DSL Turbo VIN 2 (2004)
Fuel Filter: Service and Repair
Fuel System Priming
FUEL SYSTEM PRIMING
IMPORTANT: In order for the DURAMAX diesel engine fuel system to work properly, the fuel lines must be full of fuel and contain no air. If air
gets into the fuel lines, it will be necessary to prime the fuel system to eliminate the air before operating the vehicle. Air could have entered to system
in one of the following ways:
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The vehicle ran out of fuel.
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The filter was removed for service or replacement.
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The fuel lines were removed or disconnected for servicing.
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The fuel filter water drain cock was opened while the engine was running.
If one or more of the above occurred, air has entered the fuel system and you will need to prime the system prior to operating the vehicle.
1. Prior to priming the engine, ensure that the following is complete:
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There is fuel in the fuel tank.
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The fuel filter has been installed and properly tightened.
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The fuel lines are properly connected.
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The fuel filter is cool to the touch.
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Any dirt or debris is removed from the fuel filter head and vent valve.
2. Open the vent valve by turning the screw counterclockwise several full turns.
