Water in Fuel Warning Light
If your vehicle has the 6.6L
or 7.8L DURAMAX
®
diesel
engine, this light will
come on to warn you that
there is water in the
fuel system.
For more information on how this light works, see Water
in Fuel on page 5-10.
Air Filter Restriction Indicator
If your vehicle has this
feature, the gage is
located above the
switchbank in the center of
the instrument panel. It
monitors the engine
air filter.
As the filter gets dirty, the yellow indicator will begin to
rise. When it reaches 25 inches of vacuum on the
scale, the filter should be replaced.
After replacing the filter, reset the gage by pressing in
the yellow reset button at the bottom of the gage.
If you have a Caterpillar
®
diesel engine, also see your
Caterpillar
®
Operation & Maintenance Manual.
3-46
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