GMC duramax diesel 2016 Supplement Manual page 61

60 Driving and Operating
The fuel filter is on the driver side,
inside the frame rail in front of the
fuel tank.
1. Drain any water from the filter.
See Removing Water from
Fuel Filter in Water in
Fuel 0 53.
Keep the engine off until the
procedure is completed.
2. Apply the parking brake.
3. There are two caps under the
filter. Clean the fuel filter area
before removing these two
filter caps.
Caution
Failure to cover the fuel filter with
a clean cloth to keep out debris
when replacing may cause dirt to
get into the engine. This could
cause engine damage. Keep the
fuel filter covered with a clean
cloth when replacing.
4. Remove both the filter
elements. If there is any dirt on
the filter sealing surface, clean
it off.
5. Install the new filter elements
and tighten both the caps.
6. Use the fuel filter priming
procedure earlier in this section
to prime the fuel filter.
7. Start the engine and let it idle
for five minutes. Check the fuel
filter for leaks.
8. Reset the fuel filter monitor.
See Driver Information Center
(DIC) 0 21.
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) 0 37.
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.