Passlock III reset procedure

How to do a Passlock III reset

This is one in a series of articles. READ THIS FIRST

GM made several different types of anti-theft systems. VATS, PassKey, and PassLock. The troubleshoot and reset procedures are different for each. PassLock seems to have the highest failure rate. So if you have a key WITHOUT a chip in it, chances are it’s a PassLock system. This article describes how to troublshoot and fix a PassLock system. But here are some more articles to help

Click here to see the resetting procedure for PassLock

Click here to see the trouble codes for a PassLock system

Click here to see a typical PassLock wiring diagram

IF you have a PassKEY system, click here to see the reset procedure

Passlock III reset procedure, reset security system on chevy, buick, oldsmobile, cadillac, pontiac, saturn, hummer.

Passkey III Reset procedure.

Make sure the battery if fully charged because this procedure may take up to 30 minutes and you cannot start the vehicle during this time. If you’re adding a new key to the system, you MUST have all the older keys with you. All previously learned keys will be erased from the system as soon as you program the first key. After the first key has been relearned, immediately insert the next key to be programmed within 10 seconds.

1. Insert the master key with the black head into the ignition lock cylinder

2. Turn the key to ON but do not start the engine. The SECURITY light will turn on and stay on.

3. Wait 10 minutes or until the SECURITY light to turn off.

4. Turn the key to OFF for 5 seconds.

5. Turn the key to ON but do not start the engine. The SECURITY light will turn on and stay on.

6. Wait 10 minutes or until the SECURITY light to turn off.

7. Turn the key to OFF for 5 seconds.

8. Turn the key to ON but do not start the engine. The SECURITY light will turn on and stay on.

9. Wait 10 minutes or until the SECURITY light to turn off.

10. Turn the key to OFF. The key transponder will be learned on the next start cycle.

11. Start the vehicle. If it starts and runs normally, the relearn is complete. If you need to program additional keys,

12. Turn the key to OFF.

13. Insert the next key. Turn it to ON within 10 seconds of removing the previously used key.

14. Wait for the SECURITY light to turn off. That may happen quickly. You may not even notice it.

15. Repeat steps 12 through 14 for all additional keys.

© 2012 Rick Muscoplat

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