Security Light
SECURITY
This light will come on
briefly when
you
turn the
key to START.
The light will stay on until the engine starts. If the light
flashes, the Passlock@ System has entered a tamper
mode. If the vehicle fails to start, see "Passlock" in
the Index.
If the light comes on 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 see your
GM
dealer.
Service Four-wheel Drive Warning Light
(If
Equipped)
If your vehicle
is
equipped with the Automatic
Four-Wheel-Drive Transfer Case, it has a computer
which controls the four-wheel-drive system.
This light should come
on
briefly when you turn
on
the
SERVICE
4WD
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 Automatic
Four-Wheel-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.
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