Malfunction Indicator Lamp; When The Light Is On Steady; Check Engine Light - Chevrolet 2010 Avalanche Owner's Manual

This indicates that one or more of the tires is
significantly underinflated.
A tire pressure message in the Driver Information
Center (DIC), can accompany the light. See
information. Stop and check the tires as soon as it is
safe to do so. If underinflated, inflate to the proper
pressure. See
for more information.
This indicates that there may be a problem with the
Tire Pressure Monitor System. The light flashes for
about a minute and stays on steady for the remainder of
the ignition cycle. This sequence repeats with every
ignition cycle. See
for more information.
A computer system called OBD II (On-Board
Diagnostics-Second Generation) monitors operation
of the fuel, ignition, and emission control systems.
for more
It ensures that emissions are at acceptable levels for
the life of the vehicle, helping to produce a cleaner
environment.
If the check engine light comes on and stays on, while
the engine is running, this indicates that there is an
OBD II problem and service is required.
This light should come on
when the ignition is on,
but the engine is not
running, as a check to
show it is working. If it
does not, have the
vehicle serviced by your
dealer/retailer.
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