Chevrolet/GMC 6.6L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13337828) - 2020 - CRC - 4/17/19
Driving and Operating 39
Accidental Refueling with
Gasoline
Caution
If the vehicle is accidentally
refueled with gasoline, do not
continue driving the vehicle
except to get to a location where
it can be stopped safely. Driving
the vehicle will damage the
engine. Tow the vehicle for
service. Have the gasoline
removed from the tank and fuel
system.
Filling a Portable Fuel
Container
{
Warning
Filling a portable fuel container
while it is in the vehicle can cause
fuel vapors that can ignite either
by static electricity or other
(Continued)
Warning (Continued)
means. You or others could be
badly burned and the vehicle
could be damaged. Always:
.
Use approved fuel
containers.
.
Remove the container from
the vehicle, trunk, or pickup
bed before filling.
.
Place the container on the
ground.
.
Place the nozzle inside the
fill opening of the container
before dispensing fuel, and
keep it in contact with the fill
opening until filling is
complete.
.
Fill the container no more
than 95% full to allow for
expansion.
.
Do not smoke, light
matches, or use lighters
while pumping fuel.
.
Do not use electronic
devices while pumping fuel.
Trailer Towing
When towing at high elevation on
steep uphill grades, consider the
following:
Engine coolant at higher elevation
will boil at a lower temperature than
at or near sea level. If the engine is
turned off immediately after towing
at high elevation on steep uphill
grades, the vehicle may show signs
similar to engine overheating. To
avoid this, let the engine run while
parked (preferably on level ground)
with the transmission in P (Park)
and the parking brake applied for at
least five minutes before turning the
engine off. If the overheat warning
comes on, see Engine Overheating
0 74.
Use the following chart to determine
the maximum the trailer can weigh,
based upon your vehicle model and
options.
All axles of the trailer must be
equipped with brakes adequate for
the intended use. Trailer braking
equipment conforming to Canadian
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