Tire Pressure Light; Malfunction Indicator Lamp - GMC 2004 Yokon Denali Owner's Manual

Tire Pressure Light

A CHECK TIRE PRESSURE DIC message will
accompany the light.
This light will also come on for a bulb check when the
vehicle is started.
See Tire Pressure Monitor System on page 5-65 for
more information.
For more information on the proper tire pressure, see
Loading Your Vehicle on page 4-48. For more
information on your tires, see Tires on page 5-56.
3-42
If your vehicle is equipped
with the Tire Pressure
Monitor system, this light
will come on if the
system detects low tire
pressure.

Malfunction Indicator Lamp

Check Engine Light
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended to
assure that emissions are at acceptable levels for the life
of the vehicle, helping to produce a cleaner environment.
The check engine light 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 may prevent more serious damage to your
vehicle. This system is also designed to assist your
service technician in correctly diagnosing any
malfunction.
Notice: If you keep driving your vehicle with this
light on, after a while, your emission controls may
not work as well, your fuel economy may not be as
good, and your engine may not run as smoothly. This
could lead to costly repairs that may not be covered
by your warranty.
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition, and emission
control systems.