GMC 2002 Envoy Owner's Manual page 86

R
Passlock
Your vehicle is equipped with the Passlock
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theft deterrent system.
Passlock is a passive theft
enables fuel if the ignition lock cylinder is turned with a
valid key. If a correct key is not used or the ignition lock
cylinder is tampered with, the fuel system is disabled
and the vehicle will not start.
During normal operation, the SECURITY light will
turn off approximately five seconds after the key is
turned to RUN.
If the engine stalls and the SECURITY light flashes,
wait about 10 minutes until the light stops flashing
before trying to restart the engine. Remember to release
the key from START as soon as the engine starts.
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deterrent system. Passlock
If the engine does not start after three tries, the vehicle
needs service.
If the engine is running and the SECURITY light comes
on, you will be able to restart the engine if you turn the
engine off. However, your Passlock system is not
working properly and must be serviced by your dealer.
Your vehicle is not protected by Passlock at this time.
You may also want to check the fuse (see "Fuses and
Circuit Breakers" in the Index). See your dealer
for service.
In an emergency, call the GM Roadside Assistance
Center. See "Roadside Assistance" in the Index.
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