Thought I would give this its own thread, with a proper title.


From LS1.com's FAQ thread

Progressive Doorlock Bypass

For those of you who dont know...progressive door locks is when you hit the unlock button on the remote once to unlock the drivers door and then hit it again to unlock the passenger door. These instruction are on how to bypass it so that both doors unlock on the first press. The second press of the button will now be an extra channel giving you the abitlity to control other options such as remote start, window roll down, turn on radio, whatever you can think of that needs a pulse to activate.

1. Look under the glove box. You will see a black panel that covers everything above it. There are two clips right at the base of the glovebox that holds the front side of the panel up. Remove these to clips so that the panels hangs down giving you access to the wires above it.

2. Look for a green plug. There will be five wires in it. -Orange/Black stripe -Red/black stripe -Grey/Black stripe -Tan -Grey

3. Unplug the harness. The female side is the bigger side and is light green. The male side is the smaller side and is dark green. You will be working with the female side.

4. Cut the grey/black stripe wire on the female side.

5. You should now have a short length of wire going back into the female plug and the other side goes back into the wiring of the car. Splice the side going back into the plug with the Tan wire.

6. The wire that goes back into your car is now your extra channel on your alarm. Its is a 12V pulse.

Most remote starts and window modules need just a pulse to activate. This will give it to you now from the factory alarm. Installation of these components would be done just as if there were an aftermarket alarm except that you would hook the trigger wire to the grey/black wire that is left over.

Since doing mine originally Ive found that some cars just have a plug going directly into the BCM. Wires are the same color. You just need to verify which side is the output to the locks with a voltmeter.

 

Here is the progressive door unlock bypass modification as it applied to my 99 ss.

This will enable you to unlock both driver and passenger doors with just one press of the unlock button.


1. Look under the glove box. You will see a black panel that covers everything above it. There are two clips right at the base of the glovebox that holds the front side of the panel up. Remove these to clips so that the panels hangs down giving you access to the wires above it.

2. Look for a small connector on the BCM with five wires in it. -Orange/Black stripe -Red/black stripe -Grey/Black stripe -Tan -Grey

3. Cut the grey/black stripe wire.

4. You should now have a short length of wire going back into the plug and the other side goes back into the wiring harness. Splice the side going back into the harness with the Tan wire.

5. The wire that goes back into the plug is now an extra channel on your alarm. It is a 12V pulse.