GMC Duramax Diesel 2015 Owner's Manual page 62

8. Reinstall and tighten the filter
container and reconnect the
water sensor wire to the filter.
9. Reposition the wheel liner.
10. Install and tighten the
fasteners.
11. Use the fuel filter priming
procedure earlier in this section
to prime the fuel filter.
12. Start the engine and let it idle
for five minutes. Check the fuel
filter and air bleed valve for
leaks.
13. Reset the fuel filter monitor.
See Fuel System Messages on
page 5-13.
Van Models
If the fuel operated heater (FOH) is
not working, the FOH line requires
priming. See your dealer for service.
See Fuel Operated Heater (FOH) on
page 9-11.
Warning
Diesel fuel is flammable. It could
start a fire if something ignites it,
and people could be burned. Do
not let it get on hot engine parts,
and keep matches or other
ignition sources away.
The fuel filter and fuel pump screen
are on the driver side frame rail in
front of the fuel tank.
The fuel pump screen should be
inspected and cleaned if necessary
at each fuel filter inspection or
replacement.
The fuel level must be less than
three-quarters full.
1. Drain any water from the filter.
See Removing Water From
Fuel in Water in Fuel on
page 9-28.
2. Keep the engine off until the
procedure is completed.
Driving and Operating
Fuel Filter
1. Apply the parking brake.
2. Unplug the water sensor wire
connected to the fuel filter
(lowest wire) and unscrew the
filter cap.
3. Remove the filter element.
If there is any dirt on the filter
sealing surface, clean it off.
4. Install the new filter element.
5. Reinstall and tighten the filter
cap and reconnect the water
sensor wire to the filter.
9-35