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Discussion Starter #1
my bcm took dump, confused on replacement procedure
 

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LS9 FTW
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It is my understanding that 04 specific GTO BCM's are still available new from GM. I think you can purchase from RockAuto.

You would then have to go to a GM dealer with the Tech II & network access to the GM server to program the BCM: with your keyfobs, and re-link with the ECU and PIM units.

You can buy a used BCM from another 04 GTO that would plug in and bypass the VATS with HPtuners and the car would work, but I think certain things won't work since the PIM/ECU can't be relinked with a used BCM. I'm certain that you will need brand new key fobs for this method.

Unfortunately from another thread that you bumped prior, since your original BCM is done, you can't just clone it with a used BCM (which would have been the easiest/economical way to proceed and have everything work).
 

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Discussion Starter #4
yes i see them new on rockauto even amazon. I guess i cant avoid dealer trip.
Car starts and drives with original bcm, my wipers and low speed fan are stuck on

It is my understanding that 04 specific GTO BCM's are still available new from GM. I think you can purchase from RockAuto.

You would then have to go to a GM dealer with the Tech II & network access to the GM server to program the BCM: with your keyfobs, and re-link with the ECU and PIM units.

You can buy a used BCM from another 04 GTO that would plug in and bypass the VATS with HPtuners and the car would work, but I think certain things won't work since the PIM/ECU can't be relinked with a used BCM. I'm certain that you will need brand new key fobs for this method.

Unfortunately from another thread that you bumped prior, since your original BCM is done, you can't just clone it with a used BCM (which would have been the easiest/economical way to proceed and have everything work).
 

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You can't reuse a BCM unless it's rebuilt.
Keys can not be reused.
As follows:

Body Control Module (BCM) Programming/RPO Configuration
ECM/PIM/BCM Security Link
If the engine control module (ECM), powertrain interface module (PIM) and/or the body control module (BCM) are replaced, the new modules must be security linked to each other. If the procedure is not performed, the engine will not crank or run. If the BCM has been replaced then replace and program all of the key fob transmitters for each of the vehicle's keys. The replacement BCM comes with a new security number replacing the number on the vehicle's security card.

Linking the BCM to the PIM
With the Tech 2, perform the following procedures:

Replace the key fob transmitter for each of the vehicle's keys.
Connect the Tech 2 to the data link connector (DLC) and select: Diagnostic / Pontiac GTO/ Body / Body Control Module / Special Functions / Program Key Fobs, and follow the screen instructions to program the key fob transmitters. Refer to Transmitter Programming Transmitter Programming for further information.
When prompted, enter the security code located on the new BCM and follow the Tech 2 instructions. If a valid code is entered, the new BCM and key fobs will now be linked to each other. The key fobs will be write protected by the BCM and can never be link to another BCM.
After successfully programming the new key fobs, backup to Special Functions and select Link BCM to PIM and enter the new BCM security number. This will link the new BCM to the PIM and the security information in the PIM will change. Therefore, the PIM and the ECM will have to be linked. Perform a Vehicle Theft Deterrent relearn through SPS Programming. This will link the PIM to the ECM.
Linking the PIM to the BCM
Important: If a new Powertrain Interface Module has been installed in the Vehicle, it must be security linked to the Body Control Module and the Engine Control Module. It is recommended that you link the PIM to the BCM before linking to the ECM. For information on linking the PIM to the ECM refer to Engine Control Module Programming and Setup .


Connect the Tech 2 to the data link connector (DLC) and select: Diagnostic / Pontiac GTO/ Body / Powertrain Interface Module / Special Functions / Link BCM to PIM, and follow the screen instructions.

PIM Reset Procedure
The PIM reset procedure is only required when moving a known good PIM from one vehicle to another for the purpose of diagnosing the vehicle.

When a PIM has been installed into a vehicle, it is security linked to the BCM and the ECM. Once this linking has been performed, the PIM cannot be installed in any other vehicle unless the security linking between the BCM and the ECM has been reset. To reset the PIM refer to Service Programming System (SPS) .

PIM Configuration
This procedure will configure the PIM for either an automatic or manual transmission.

Connect the Tech 2 to the data link connector (DLC) and select: Diagnostic / Pontiac GTO/ Body / Powertrain Interface Module / Special Functions / PIM Configuration, and follow the screen instructions.
Select the transmission type and press the soft key.


Linking the BCM to the PIM without Tech 2
Without the Tech 2, perform the following procedure:

Replace the key fob transmitter for each of the vehicle's keys. Program the key fob transmitter. Refer to Transmitter Programming Transmitter Programming in Keyless Entry.
Turn ignition ON with a valid key.
Leave the ignition in the ON position for 10 minutes. After 10 minutes the car horn will chirp once.
Turn the ignition OFF within 5 minutes after the horn chirp and ON again within 5 seconds. If the timing expires for this step, the sequence will be cancelled.
Leave the key in the ON position for 10 minutes. After 10 minutes the car horn will chirp twice.
Turn the ignition OFF within 5 minutes after the horn chirps and ON again within 5 seconds.
Leave the key in the ON position for 10 minutes, after 10 minutes the car horn will chirp three times. During the three horn chirps the BCM and PIM are being linked.
Turn the ignition OFF, and wait 5 seconds.
Turn the ignition ON and leave the ignition in the ON position for 10 minutes.
Turn the ignition OFF, and wait 5 seconds.
Turn the ignition ON and leave the ignition in the ON position for 10 minutes.
Turn the ignition OFF, and wait 5 seconds.
Turn the ignition ON and leave the ignition in the ON position for 10 minutes.
The ECM is now ready to relearn the password from the PIM on the next ignition switch transition from OFF to CRANK.
Turn the ignition ON. Linking is now completed.
Turn the ignition to crank and run engine at idle speed, to confirm the linking procedure has been successful.
 

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Discussion Starter #6
So i can buy new bcm and reuse my old key with relink procedure?

You can't reuse a BCM unless it's rebuilt.
Keys can not be reused.
You can install a new BCM without a Tech 2 if you have an original key that was programed. As follows:

Body Control Module (BCM) Programming/RPO Configuration
ECM/PIM/BCM Security Link
If the engine control module (ECM), powertrain interface module (PIM) and/or the body control module (BCM) are replaced, the new modules must be security linked to each other. If the procedure is not performed, the engine will not crank or run. If the BCM has been replaced then replace and program all of the key fob transmitters for each of the vehicle's keys. The replacement BCM comes with a new security number replacing the number on the vehicle's security card.

Linking the BCM to the PIM
With the Tech 2, perform the following procedures:

Replace the key fob transmitter for each of the vehicle's keys.
Connect the Tech 2 to the data link connector (DLC) and select: Diagnostic / Pontiac GTO/ Body / Body Control Module / Special Functions / Program Key Fobs, and follow the screen instructions to program the key fob transmitters. Refer to Transmitter Programming Transmitter Programming for further information.
When prompted, enter the security code located on the new BCM and follow the Tech 2 instructions. If a valid code is entered, the new BCM and key fobs will now be linked to each other. The key fobs will be write protected by the BCM and can never be link to another BCM.
After successfully programming the new key fobs, backup to Special Functions and select Link BCM to PIM and enter the new BCM security number. This will link the new BCM to the PIM and the security information in the PIM will change. Therefore, the PIM and the ECM will have to be linked. Perform a Vehicle Theft Deterrent relearn through SPS Programming. This will link the PIM to the ECM.
Linking the PIM to the BCM
Important: If a new Powertrain Interface Module has been installed in the Vehicle, it must be security linked to the Body Control Module and the Engine Control Module. It is recommended that you link the PIM to the BCM before linking to the ECM. For information on linking the PIM to the ECM refer to Engine Control Module Programming and Setup .


Connect the Tech 2 to the data link connector (DLC) and select: Diagnostic / Pontiac GTO/ Body / Powertrain Interface Module / Special Functions / Link BCM to PIM, and follow the screen instructions.

PIM Reset Procedure
The PIM reset procedure is only required when moving a known good PIM from one vehicle to another for the purpose of diagnosing the vehicle.

When a PIM has been installed into a vehicle, it is security linked to the BCM and the ECM. Once this linking has been performed, the PIM cannot be installed in any other vehicle unless the security linking between the BCM and the ECM has been reset. To reset the PIM refer to Service Programming System (SPS) .

PIM Configuration
This procedure will configure the PIM for either an automatic or manual transmission.

Connect the Tech 2 to the data link connector (DLC) and select: Diagnostic / Pontiac GTO/ Body / Powertrain Interface Module / Special Functions / PIM Configuration, and follow the screen instructions.
Select the transmission type and press the soft key.


Linking the BCM to the PIM without Tech 2
Without the Tech 2, perform the following procedure:

Replace the key fob transmitter for each of the vehicle's keys. Program the key fob transmitter. Refer to Transmitter Programming Transmitter Programming in Keyless Entry.
Turn ignition ON with a valid key.
Leave the ignition in the ON position for 10 minutes. After 10 minutes the car horn will chirp once.
Turn the ignition OFF within 5 minutes after the horn chirp and ON again within 5 seconds. If the timing expires for this step, the sequence will be cancelled.
Leave the key in the ON position for 10 minutes. After 10 minutes the car horn will chirp twice.
Turn the ignition OFF within 5 minutes after the horn chirps and ON again within 5 seconds.
Leave the key in the ON position for 10 minutes, after 10 minutes the car horn will chirp three times. During the three horn chirps the BCM and PIM are being linked.
Turn the ignition OFF, and wait 5 seconds.
Turn the ignition ON and leave the ignition in the ON position for 10 minutes.
Turn the ignition OFF, and wait 5 seconds.
Turn the ignition ON and leave the ignition in the ON position for 10 minutes.
Turn the ignition OFF, and wait 5 seconds.
Turn the ignition ON and leave the ignition in the ON position for 10 minutes.
The ECM is now ready to relearn the password from the PIM on the next ignition switch transition from OFF to CRANK.
Turn the ignition ON. Linking is now completed.
Turn the ignition to crank and run engine at idle speed, to confirm the linking procedure has been successful.
 
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