2005 Hummer H2 Owner's Manual - Page 100

While the alarm is set, the power door unlock switch is not operational. If the alarm does not sound when it should but the headlamps flash, check to see if the horn works. The horn fuse may be blown. To replace the fuse, see Instrument Panel Fuse Block on page 5-103 and Underhood Fuse Block on page 5-107. If the alarm does not sound or the headlamps do not flash, the vehicle should be serviced by your dealer. 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. 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 Instrument Panel Fuse Block on page 5-103 and Underhood Fuse Block on page 5-107. See your dealer for service. In an emergency, call the Roadside Assistance Center. See Roadside Assistance Program on page 7-6. Passlock® Your vehicle is equipped with the Passlock® theft-deterrent system. Passlock® is a passive theft-deterrent system. Passlock® 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. 2-24