GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 35628-A Pass/Vats Interrogator

In order to copy a PASS-Key® II ignition key, determine the necessary key code or resistance value.

When servicing the PASS-Key® II system, obtain all of the vehicle ignition keys. Verify the key code values with the J 35628-A .

    Important: Disconnect the tool wiring connectors.

  1. Turn on the J 35628-A .
  2. Insert the key into the tool lock cylinder.
  3. Note the measured key code of the master ignition key as displayed on the key code reader.
  4. Obtain a key blank matching the key code.
  5. Cut the key blank to match the original key.