Service Four-Wheel Drive Warning Light; Check Gages Warning Light - GMC ENVOY XL 2004 Owner's Manual

Service Four-Wheel Drive
Warning Light
United States
This light should come on briefly when you turn on the
ignition, as a check to show you it is working.
The SERVICE 4WD light comes on to indicate that
there may be a problem with the drive system and
service is required. Malfunctions can be indicated by the
system before any problem is apparent, which may
prevent serious damage to the vehicle. This system is
also designed to assist your service technician in
correctly diagnosing a malfunction.

Check Gages Warning Light

Canada
The CHECK GAGES light will come on briefly when you
are starting the engine.
If the light comes on and stays on while you are driving,
check your coolant temperature and engine oil
pressure gages to see if they are in the warning zones.
United States Canada
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