Malfunction Indicator Lamp - GMC 2016 Silverado Manual

6 Instruments and Controls
CNG fuel gauge readings are
affected by changes in fuel
temperature and fuel pressure.
See Fuel Gauge in the owner
manual.
Malfunction
Indicator Lamp
The malfunction indicator lamp is in
the instrument cluster.
This vehicle has been specifically
designed to illuminate this indicator
when emissions exceed acceptable
levels while operating on either
gasoline or CNG fuel.
The malfunction indicator lamp
comes on to indicate that there is a
problem and service is required.
Malfunctions often will be indicated
by the system before any problem is
apparent. This system is also
designed to assist the service
technician in correctly diagnosing
any malfunction.
Caution
If the vehicle is continually driven
with this light on, the emission
controls might not work as well,
the vehicle fuel economy might
not be as good, and the engine
might not run as smoothly. This
could lead to costly repairs that
might not be covered by the
vehicle warranty.
This light should come on as a
check to show you it is working
when the ignition is on and the
engine is not running.
See the owner manual for more
information.
CNG Malfunction Indicator
The CNG indicator light on the fuel
selector switch in the center stack
will show if the CNG system has an
error. If the light is blinking rapidly
and does not stop, an error has
occurred. The light will continue to
flash rapidly until the problem is
corrected. See your dealer for
service.