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GMC 2006 DURAMAX - Page 34

GMC 2006 DURAMAX
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5. Open the fuel filter vent
valve by turning the
screw counterclockwise
several full turns. The
vent valve is located
on top of the fuel filter
housing.
6. Repeatedly push down
on the fuel filter priming
pump with the palm of
your hand. The pump
is located on top of the
fuel filter housing. Let
the pump return upward
between pushes.
7. Operate the priming pump until a small amount of
fuel seeps from the vent valve. When you see the
fuel, the filter is now full of fuel and the system
should be primed.
8. Close the vent valve. Clean any fuel which
accumulated on the fuel filter. Start the engine and
let idle for a few minutes. Check the filter for leaks.
Q: How do I prime the vehicle? (Van Models)
A: Your vehicle is equipped with an electric priming
pump which is located in front of the fuel tank
under your vehicle. The priming pump is operated
electrically and is designed to bring fuel to the engine
to eliminate any air that may be in the fuel lines.
To prime the engine, do the following:
1. Turn the ignition key on for two minutes. The fuel
pump will be operating and starting the priming
process. Do not start the engine during the first
two minutes.
2. After completing the initial prime in Step 1, turn the
ignition off, then back to start and crank the engine
for 15 seconds.
3. If the engine does not start, repeat Steps 1 and 2
until the engine starts.
5-10

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