Theft Deterrent Relearn: Notes

NOTE: Following procedure is written specifically for Tech 2 scan tool. A generic scan tool may not be capable of performing all necessary reprogramming functions.

NOTE: Vehicles are equipped with Passlock(tm) theft deterrent system. When replacing BCM with original equipment GM replacement part, BCM will learn Passlock(tm) sensor data code automatically, but Powertrain Control Module (PCM) must be manually programed to new password (in order to allow crank relay and fuel injectors operation) using following procedures.

NOTE: When replacing PCM with original equipment GM replacement part, PCM will learn new password (in order to allow crank relay and fuel injectors operation) automatically. Once password is learned, any procedure requiring PCM to learn a new password, such as replacing BCM or Passlock(tm) sensor will require new password to be programed manually using following procedures. If a PCM is used in another vehicle, PCM will have to be manually programmed to new vehicles password using following procedures.