GM Service Manual Online
For 1990-2009 cars only

Programming Additional Keys Scan 100

  1. Install the immobilizer control unit cartridge in the scan tool.
  2. Turn OFF the ignition.
  3. Connect the scan tool.
  4. Turn ON the ignition with the key to be coded.
  5. Enter the 4-digit password that enables service personnel to use the scan tool for key coding.
  6. Use the scan tool command.
  7. Verify that the key coding was successful by starting the engine with each of the authorized keys.

Programming Additional Keys Tech 2

A maximum of 5 keys may be programmed.

Refer to Programming Theft Deterrent System Components to program any new keys. Make sure all available keys are programmed at this time. Any keys that are not programmed at this time will no longer function.