Change Engine Oil; Low Washer Fluid - Chevrolet 2002 Tahoe Owner's Manual

Change Engine Oil

When you change the engine oil, be sure to reset the
Engine Oil Life System. See "Engine Oil, When to
Change" in the Index.
Security
If the security message is displayed continuously while
driving and stays on, there may be a problem with the
Passlock System. Your vehicle will not be protected by
Passlock, and you should contact your GM dealer.
This message is displayed
when the engine oil needs
to be changed. The message
is only displayed for
15 seconds at the start
of each ignition cycle.
This message is displayed
when the content
-
theft deterrent system
(if equipped) has been
activated and also monitors
R
the Passlock System.
Service 4WD (If Equipped)
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.

Low Washer Fluid

For more information, see "Windshield Washer Fluid" in
the Index.
If the SERVICE 4WD
message comes on, there
may be a problem with the
automatic transfer case and
service is required.
This message is displayed
when the vehicle is low on
windshield washer fluid.
The message is only
displayed for 15 seconds
at the start of each
ignition cycle.
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