![]() ![]() If a fault occurs when trying to start the vehicle, it probably won't start. If a fault occurs while driving, the engine may or may not start after turning the ignition off. When the system detects a fault, the warning light will illuminate or a message will be displayed on the DIC, depending on the model. Under normal operation, you should see the warning light on during bulb check and off when the engine is running-no message displayed on the DIC. Operating states of the warning light on Passlock systems should be: These include the ignition lock cylinder, Powertrain Control Module (PCM), Body Control Module (BCM), or Instrument Panel Cluster (IPC). Depending on the system, replacement of key components will necessitate that a relearn procedure be completed. If the engine still won't start, repeat the above steps 2 more times (30 minutes total)Īfter the learn procedure is completed and the engine is running, the security light may stay on steady for a few minutes and then go off - this is normal.If it starts and runs, everything worked! Turn the key to the OFF position for 20 seconds.Release the key to the RUN position and leave it there for 10 minutes.It should crank but not start, and the security light will be flashing. ![]() Start from the ignition in the OFF position.The Passlock family has two basic relearn procedures - a ten-minute procedure and a thirty-minute procedure - and which one you use depends on the system and what components have been replaced. Reprogramming Passlock with a learning procedure The Passlock family of anti-theft systems are still in use today. The Passlock II and III (PK3) systems followed shortly after the introduction of the Passlock I system. The Passlock I system is considered the replacement for the GM Vehicle Anti-Theft System (VATS). ![]()
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