Replaced stock bcm with used. Was reprogramming with the method of turning key to start position (vehicle won't start) then leaving it in the on postition for approx 10 minutes until the theft lock light goes out, turning the key to off, wait 5 seconds, repeat all of the above 2 more times. Right before the theft lock light went off the second time, the car chimed several times with the airbag light blinking. Then the theftlock light wouldn't come back on to finish the third round. Car won't start. Only chimes.

Here you go have fun...
For those vehicles that use a BCM, the BCM can learn the resistance value of the existing key by using the relearn process. In order for the vehicle to start, the BCM (as well as the Passkey module in other vehicles) must identify the resistor pellet in the key, then the BCM sends a password to the PCM. If this password matches the password stored in the PCM, the system enables fuel delivery. So you can see that if either the BCM or PCM are replaced, a relearn procedure is necessary. This same relearn procedure can be used if an ignition key with a different resistance value is used to replace the existing key. Before beginning the relearn, make sure there is a fully charged battery in the vehicle, and both the BCM and PCM are properly powered up and in communication with each other. Now you're ready to initiate the relearn procedure.

1. First, insert the ignition key and turn the ignition switch to the "On" position (Do not start the engine). Leave the switch on for 11 minutes. The security light may flash or be on steady during this 11 minute period. Make sure the light is no longer on or flashing before proceeding to #2 .
2. Turn the ignition switch off for 30 seconds.
3. Turn the ignition switch to the "On" position (as in step #1) for 11 minutes again.
4. Turn the ignition switch off for another 30 seconds.
5. Turn the ignition switch to the "On" position for 11 minutes a third time.
6. Turn the ignition switch off for 30 seconds one final time.
7. Turn the ignition switch to the "On" position one final time and wait 30 seconds.
8. Attempt to start the engine. If the engine starts and runs normally, the relearn is complete. If the engine does not start, check for trouble codes and address them before attempting the relearn procedure again.
Sorry kinda long but it is what it is.
Have a good one.

Body Control Module (BCM) Replacement and Reprogramming
If the BCM is replaced or requires reprogramming, the following procedures must be performed in the specified order:
BCM Setup -- Using a scan tool, go to Vehicle Control Systems » Computer/Integrating Systems » Module Setup » Body Control Module. Select Setup BCM and follow the on-screen instructions, making sure to select the proper RPOs and input the VIN correctly.
BPP Sensor Calibration--Refer to Brake Pedal Position Sensor Calibration
Program Key Fobs--Refer to Transmitter Programming
Setup SDM Part Number in BCM -- Using a scan tool, go to Vehicle Control Systems » Computer/Integrating Systems » Module Setup » Body Control Module. Select Setup SDM Part Number in BCM and follow the on-screen instructions.

It's under your back seat. See here for picture http://www.ebay.com/itm/like/261068608953?lpid=82
Here is the relearn procedure which you have to perform so the new BCM will recognize your key and start the car:
For those vehicles that use a BCM, the BCM can learn the resistance value of the existing key by using the relearn process. In order for the vehicle to start, the BCM (as well as the Passkey module in other vehicles) must identify the resistor pellet in the key, then the BCM sends a password to the PCM. If this password matches the password stored in the PCM, the system enables fuel delivery. So you can see that if either the BCM or PCM are replaced, a relearn procedure is necessary. This same relearn procedure can be used if an ignition key with a different resistance value is used to replace the existing key. Before beginning the relearn, make sure there is a fully charged battery in the vehicle, and both the BCM and PCM are properly powered up and in communication with each other. Now you're ready to initiate the relearn procedure.

1. First, insert the ignition key and turn the ignition switchto the "On" position (Do not start the engine). Leave the switch on for 11 minutes. The security light may flash or be on steady during this 11 minute period. Make sure the light is no longer on or flashing before proceeding to #2 .
2. Turn the ignition switchoff for 30 seconds.
3. Turn the ignition switchto the "On" position (as in step #1) for 11 minutes again.
4. Turn the ignition switchoff for another 30 seconds.
5. Turn the ignition switchto the "On" position for 11 minutes a third time.
6. Turn the ignition switchoff for 30 seconds one final time.
7. Turn the ignition switchto the "On" position one final time and wait 30 seconds.
8. Attempt to start the engine. If the engine starts and runs normally, the relearn is complete. If the engine does not start, check for trouble codes and address them before attempting the relearn procedure again.
You can pick one oif these up for $20 or less at a junkyard. For those vehicles that use a BCM, the BCM can learn the resistance value of the existing key by using the relearn process. In order for the vehicle to start, the BCM (as well as the Passkey module in other vehicles) must identify the resistor pellet in the key, then the BCM sends a password to the PCM. If this password matches the password stored in the PCM, the system enables fuel delivery. So you can see that if either the BCM or PCM are replaced, a relearn procedure is necessary. This same relearn procedure can be used if an ignition key with a different resistance value is used to replace the existing key. Before beginning the relearn, make sure there is a fully charged battery in the vehicle, and both the BCM and PCM are properly powered up and in communication with each other. Now you're ready to initiate the relearn procedure.

1. First, insert the ignition key and turn the ignition switchto the "On" position (Do not start the engine). Leave the switch on for 11 minutes. The security light may flash or be on steady during this 11 minute period. Make sure the light is no longer on or flashing before proceeding to #2 .
2. Turn the ignition switchoff for 30 seconds.
3. Turn the ignition switchto the "On" position (as in step #1) for 11 minutes again.
4. Turn the ignition switchoff for another 30 seconds.
5. Turn the ignition switchto the "On" position for 11 minutes a third time.
6. Turn the ignition switchoff for 30 seconds one final time.
7. Turn the ignition switchto the "On" position one final time and wait 30 seconds.
8. Attempt to start the engine. If the engine starts and runs normally, the relearn is complete. If the engine does not start, check for trouble codes and address them before attempting the relearn procedure again.

This may work if you are cetain that the vehicle has a flashing securt=ity light on when trying to start the vehicale or even with the key just in the "run" position. Turn the key on and leave it in the on position for approximately 15 to 30 minutes. (make sure that you have a substantial battery to perform this or a battery charger on the vehicle during this process) Leave the key on until the security light goes on solid. (stops flashing) turn the key off and then attempt to start the engine. If light begins to flash again, then there is something wrong with signal being sent to the body control module(BCM) from the ignition switch's key code. If it starts and the light goes off, all is well for now. there could be an intermittent problem in the VATS system. If the light DOES flash again and the no start is still present, you will need to have it looked at and diagnosed by a professional to determine the security breach.

Check to see if security light on dash is on after turning key to on/start position and letting dash lights run dianosis.(after 10 to 15 seconds). Pontiac uses a security theft system which shuts-down fuel injectors when a different key is used or the Body Control Module thinks the car is being stolen. Pontiac designed this so the owner would have to bring the vehicle back to the dealer. My Grand Am did this and it cost me alot, just to have the dealer reset it.( took them 5 min.) You may have to re-learn the pcm and bcm. It's the same as the dealer re-setting them. The proceedure is (1) turn the key to the on/start position and leave there for 12 minutes.
(2) turn the key to the off position for 30 seconds.
Repeat steps 3 times.
After that the car should start.

I know this is a hassle, but it's a lot cheaper than taking it to the dealer. Hope this helps.

need to reprogram the security system. turn the key to start position then to run . let the key stay on until the light stops flashing. repeat these steps 3 times then the car should start if there is not a problem with the pass-lock sensor in the ignition switch or the BCM( body control module).

For a quick and easy permanent fix that will eliminate every aspect of the passlock system, go to this link

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Make sure you have the right type of ignition keys, there should be a stamp on the keys "PK3" which is the right ignition keys you need to have for your passlock system.

Auto Relearn:
Time required, approximately 10 minutes.

Insure that the battery is fully charged.
Turn the ignition switch from the OFF position to the CRANK position attempting to start the vehicle. The vehicle will start and then stall.
Leave the ignition switch in the ON position while observing the security indicator.
When the security indicator turns off, which can take up to 10 minutes, turn the ignition switch off. Wait 10 seconds.
The BCM and the PCM will learn the new code on the next start attempt.

You may have to get somebody with a scan tool to reset the computer codes to make this work.

Thank oyu for using fixya and good luck

ANY TIME SECURITY LIGHT COME ON YOU HAVE FAULT IN THE IGNITION KEY OR KEYS THEY COULD BE WORN OUT WHERE TO A POINT WHERE THE BCM AND PCM DONT RECOGNIZE THE CAR KEYS CAUSING NO START CONDITIONS.ALSO WORN KEY SWITCH AND BCM WILL CAUSE NO START CONDITIONS.TRY THESE TWO THINGS TRY ANOTHER CAR KEY IF STILL DONT CRANK.PUT KEY IN IGNITION TURN KEY TO ON POSITION WITH ENGINE OFF LEAVE KEY ON POSITION IN IGNITION FOR 10 MINUTES WATCH DASH SECURITY LIGHT WHEN IT TURNS OFF IN 10 MINUTES.TURN OFF IGNITION FOR 5 SECONDS THEN TRY STARTING CAR IF CRANKS OR DONT STILL THE PROBLEM IS IN THE THEFT SECURITY SYSTEM NEED TO GET DEALERSHIP TO FIX THEY HAVE DIAGNOSTIC EQUIPMENT TO FIX AND REPROGRAM THEFT SECURITY. SYSTEM.

It is located under the cup holder in the middle console.