GMC 2.8L Duramax Diesel 2020, Manual, Page: 39 / 104

Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336155) - 2020 - CRC - 5/6/19
38 Driving and Operating
7. If the engine starts and runs
but stalls again, turn the
ignition off for 60 seconds.
8. When the engine starts, let it
idle for a few minutes and
check the filter for any leaks.
To Prime the Fuel Operated Heater
(FOH) Fuel Lines (Van Models)
See your dealer or qualified
technician if the FOH fuel lines need
to be primed.
Running Out of Fuel
If the engine has stalled due to
running out of fuel, try to restart it:
1. If parked on a level surface,
add at least 3.8 L (1 gal) of fuel.
Up to 18.9 L (5 gal) may be
needed if parked on a slope.
2. Follow the vehicle fuel system
priming procedure earlier in
this section to re-prime the
system and restart the engine.
If the check engine light comes on
due to running out of fuel, it may
take a few drive cycles to clear.
On van models only, the Fuel
Operated Heater (FOH) stops
automatically when the fuel tank
volume is less than or equal to 10%
of the total tank. The FOH fuel lines
will not need to be primed if the
vehicle runs out of fuel.
Fuel Filter Replacement
Van 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.
To replace the fuel filter:
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. Remove the filter element cap
by turning it counterclockwise.
4. Remove the filter element.
If there is any dirt on the filter
sealing surface, clean it off.
5. Install the new filter element
and o-ring.
6. Reinstall and tighten the filter
cap to the housing.