GM Service Manual Online
For 1990-2009 cars only

You must perform a Passlockâ„¢ Learn Procedure if any of the following components have been replaced:

    â€¢ Passlockâ„¢ sensor
    â€¢ Body control module
    â€¢ Vehicle control module
    â€¢ Powertrain control module

All of the above modules except for the Passlockâ„¢ sensor must be programmed using their own vehicle configuration. See the individual module service manual section.

There are 2 types of Passlock learn procedures:

    â€¢ A 30 minute Auto Learn procedure which requires a scan tool used in order to clear codes. PASSLOCK Reprogramming Auto Learn
    â€¢ A 10 minute Seed and Key procedure which requires a Techline Terminal and a Tech 2 scan tool. This procedure is listed below:

Seed and Key - 10 Minute Procedure

  1. Ensure that the battery is fully charged.
  2. Select Service Programming on the Tech 2 screen, follow instructions.
  3. Select Service Programming on the Techline Terminal and follow instructions.