GM Service Manual Online
For 1990-2009 cars only

Important: The wire routing for the components inside the steering column is critical. When servicing the ignition lock cylinder, maintain proper wire routing.

It is not necessary to match the replacement PASS-Key® III module to the ignition key. All replacement PASS-Key® III modules automatically learn the ignition key transponder value of the first ignition key used to start the vehicle. The ignition key transponder value is learned permanently, so caution should be used to ensure that unwanted ignition key transponder values are not learned. Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column-Tilt for replacement procedures.