GM Service Manual Online
For 1990-2009 cars only

Duplicating Ignition Keys

Tools Required

J 35628-A PASS/VATS Interrogator

In order to duplicate an ignition key, determine the proper electrical code of the key.

  1. Insert the customer's spare ignition key into the key code reader on J 35628-A .
  2. Press the ON-OFF rocker switch to the ON position.
  3. A number from 1 to 15 appears in the window. This number indicates the electrical code of the key. If the interrogator displays E, replace the ignition key.
  4. Cut a new key having the electrical code determined in step 3.
  5. Use the new key to start the vehicle. Ensure the following conditions:
  6. • The key is mechanically correct.
    • The key is electrically correct.