GMC 2.8L Duramax Diesel 2020 Manual page 40

7. Use the fuel filter priming
procedure to prime the fuel
filter. See Fuel Priming in
Water in Fuel 0 34.
8. Start the engine and let it idle
for five minutes. Check the fuel
filter and air bleed valve for
leaks.
9. Reset the fuel filter monitor.
See Driver Information Center
(DIC) 0 13.
If the van Fuel Operated Heater
(FOH) (if equipped) is not working,
the FOH line requires priming. See
your dealer for service. See Fuel
Operated Heater (FOH) (Van
Models Only) 0 23.
Pickup Models
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 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 the
Fuel Filter in Water in Fuel
0 34.
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.
Driving and Operating
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 filter elements.
If there is any dirt on the filter
sealing surface, clean it off.
5. Install the new filter elements
and tighten both caps.
39