Diagnostic Aids
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
A replacement powertrain control module (PCM) is in a functional state to learn the password from the theft deterrent control module. If the theft deterrent control module is replaced, the PCM must be placed in password learning mode to relearn the new password.
Once learned, the password becomes permanent information that remains with the vehicle. The loss of PCM battery or ignition voltage does not affect the programmed password information. Refer to Programming Theft Deterrent System Components .