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Re: 2002 GMC Keyless Programming
Have you tried this procedure?
1. Open the driver's door window and close all vehicle doors.
2. Insert the key into the ignition.
3. Hold down the power UNLOCK button on the driver’s door panel-continue to hold it down until instructed to release in step 9.
4. Perform steps 5 through 8 in fairly rapid succession.
5. Turn the ignition switch to the RUN position (not START).
6. Turn the ignition switch to the OFF position.
7. Turn the ignition switch to the RUN position.
8. Turn the ignition switch to the OFF position.
9. Release the power unlock button on the door panel. The vehicle will lock and unlock the doors automatically.
10. Hold down the LOCK and UNLOCK buttons on the transmitter simultaneously until the door locks and unlocks (this step may take up to 30 seconds).
11. Repeat step 10 for each additional transmitter.
12. Turn the ignition switch to the ON position in order to exit the transmitter programming mode.
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