Cadillac XT4 Owner Manual (GMNA-Localizing-Europe-16412942) - 2023 -
CRC - 5/25/22
Driving and Operating
237
Caution
Water in the diesel fuel may corrode
internal components of the fuel system
and lead to severe damage. It may also
support fungus or bacteria growth, which
may damage the fuel system. Even with
a diesel fuel biocide, the fuel system may
still need to be cleaned. Your retailer can
advise of the appropriate solution.
If the fuel tank needs to be purged to
remove water, see your retailer or a
qualified technician. Improper purging
may damage the fuel system.
Water in Fuel Troubleshooting
If a WATER IN FUEL message illuminates:
Problem
Recommended
Action
Message displays
but turns off during
the ignition cycle.
The fuel filter is
approximately half
full of water. Drain
the water
immediately. See
"Removing Water
from the Fuel Filter"
later in this section.
Problem
Recommended
Action
Message displays
and stays on.
Drain the fuel filter
immediately. If no
water can be
drained, and the
temperature is
below freezing, then
water may be
frozen in the filter.
Move the vehicle to
a warm location to
thaw the water, and
then drain the fuel.
If water still does
not drain, see your
retailer.
Problem
Recommended
Action
Immediately after
refuelling, message
displays and
stays on.
A large amount of
water is in the fuel
tank. Drain the fuel
filter immediately.
If the message
remains illuminated,
or illuminates again
without refuelling,
then fuel tank
purging is required.
See your dealer.
If the message
displays and the
vehicle stalls or
running is rough, do
not drive until the
water-contaminated
fuel is drained.
Caution
Driving with this message on may
damage the fuel injection system and the
engine. If the message illuminates
(Continued)