Important: 
   •  When replacing a body control module (BCM) with a GM Service Parts Operation (SPO) replacement part, set up the replacement BCM prior to the 10-Minute Relearn Procedure or the 30-Minute Relearn Procedure. Refer to 
Body Control Module Programming and Setup
 .    •  When replacing a BCM with a GM SPO replacement part, the module will learn the keys immediately. The existing powertrain control module (PCM) must learn the new fuel continue password when you replace the BCM.    •  When replacing a PCM with a GM SPO replacement part, the new PCM will learn the incoming fuel enable password immediately after programming and upon receipt of a password message. A PCM which had been installed in another vehicle would have learned
the fuel enable password of the other vehicle's BCM. Perform either the 10-Minute Relearn Procedure or the 30-Minute Relearn Procedure to learn the fuel enable password of the current vehicle's BCM.    •  When performing either relearn procedure, all previously learned keys will be erased from the BCM memory.    •  Additional keys may be learned. Refer to 
Adding Keys
 . 
Use this procedure after replacing the following components:
| • | The PASS-Key III (PK3) keys | 
| • | The BCM | 
| • | The PCM | 
Important: If replacing a BCM with a GM SPO replacement part, perform the procedure to setup a new BCM prior to the 10-Minute Relearn Procedure. Refer to Diagnostic System Check - Vehicle .
Important: Perform this step ONLY on vehicles with EXPORT configured BCMs.
Important: Perform this step ONLY on vehicles with EXPORT configured BCMs.
Use this procedure after replacing the following components:
| • | The PASS-Key III (PK3) keys | 
| • | The BCM | 
| • | The PCM | 
Important: This procedure is not available on vehicles equipped with option code (Z49).
If replacing a BCM with an GM SPO replacement part, perform the procedure to setup a new BCM prior to the 30-Minute Relearn Procedure.Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.