Chevrolet/GMC 6.6L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-16504481) - 2023 - CRC - 9/26/22
28 Driving and Operating
4. Remove the filter element. Inspect the
inside of the filter cap and sealing
surface. Ensure there is no dirt or debris.
Wipe clean if necessary.
5. Install the new filter element and o-ring.
6. Reinstall and tighten the filter cap to the
housing.
7. Use the fuel filter priming procedure to
prime the fuel filter. See “Fuel Priming”
in Water in Fuel 0 25.
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 8.
Filling the Tank
An arrow on the fuel gauge indicates which
side of the vehicle the fuel door is on. See
“Fuel Gauge” in the Owner’s Manual. Do not
refill the diesel fuel and Diesel Exhaust Fluid
(DEF) at the same time.
{
Warning
Fuel vapors and fuel fires burn violently
and can cause injury or death.
Follow these guidelines to help avoid
injuries to you and others:
.
Read and follow all the instructions on
the fuel pump island.
.
Turn off the engine when refueling.
.
Keep sparks, flames, and smoking
materials away from fuel.
.
Do not leave the fuel pump
unattended.
.
Avoid using electronic devices while
refueling.
.
Do not re-enter the vehicle while
pumping fuel.
.
Keep children away from the fuel
pump and never let children
pump fuel.
.
Before touching the fill nozzle, touch a
metallic object to discharge static
electricity from your body.
(Continued)
Warning (Continued)
.
Fuel can spray out if the fuel cap is
opened too quickly. This spray can
happen if the tank is nearly full, and is
more likely in hot weather. Open the
fuel cap slowly and wait for any hiss
noise to stop, then unscrew the cap all
the way.
Double Cab Shown, Crew Cab Similar
Turn the fuel cap counterclockwise to
remove. When refueling, hang the fuel cap
from the hook on the fuel door. Fully insert
and latch the fill nozzle, begin fueling.
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