GM Passkey Passlock VATS Bypass

PLEASE CLICK THE "SHOW MORE" BELOW AND SPEND A MINUTE READING THRU THIS - IT MAY HELP YOU MORE THAN THE VIDEO. THANKS!

This video shows how to bypass the anti-theft circuit on a 2007 Chevy Silverado (Classic) 2500HD Diesel. This probably should work for any full size 2003-2007 (classic) GM truck or 2003-2006 SUV. My guess is that even the smaller trucks and SUV's with this type of steering column will also be the same.

For information I have found on the different types of GM systems and relearn procedures please download this pdf: https://drive.google.com/file/d/0B_Jb...

You will need to remove the dash trim (snaps out - careful that you pull enough just to get it snapped away from the cluster and not crack or break the dash trim), knee panel (7mm screws at the bottom of the panel and snap/guides at the top) below the steering wheel and the metal wiring cover (10mm nuts) under the steering shaft.

Find the yellow and black small gauge wires coming from the top of the key cylinder that are bundled in with 7 larger gauge wires and three other smaller gauge wires at the bottom side of the steering column - these are in there own bundle. There is another bundle for the clock spring that runs with this bundle - DO NOT GET INTO THAT HARNESS as it contains all your steering wheel controls (if applicable) and your air bag. Cut the yellow wire and strip a section of the black wire to get a meter on. Strip both ends of the yellow wire. Put the black lead on the black wire and the red lead on the yellow wire going up to the key cylinder. Insert your key into the ignition and turn it to the "ON" position (do not start the vehicle - will only run for a second or so even if you do). Set your meter to ohms and get that reading. Go to radio shack and by resistor(s) that will match the resistance you read on the meter. Install the resistor(s) across the black and yellow wire going back into the vehicles I/BCM or ignition/body control module. Using a solder gun for this is best. Heat shrink or tape and secure the resistor(s) and yellow wire going back up to the key cylinder. You should be able to start your vehicle now using your remote start or any $3 cut key from Home Depot or other hardware store.

This bypass could also solve a GM vehicle mysteriously not starting or dying on occasion. I have a 2002 Suburban that would start and run for just a second and then cut off and it turned out the anti-theft circuit was failing and causing the problem. Once I installed this type of bypass, never had the issue again.

Feel free to post comments or suggestions and if you have any questions I will do my best to answer them.

UPDATE:
Since I posted this video, I have had several questions from people swapping steering columns; engines; PCM's; BCM's etc. and felt like I should add some more information here since I know I am not the fastest in responding to questions here and most of you out there want to get your vehicle going faster than my response in most cases!

Let me try to briefly explain how the VATS system works: When you insert the key into the ignition and turn it to on/start it sends a voltage/resistance signal to a BCM (Body Control Module) and the BCM tells the PCM (Power Control Module or often also referred to as the ECU ECM PCU Computer) to start the engine. If the BCM gets the incorrect signal from the ignition, it sends a message to the PCM to shut off the injectors. In some cases it will also shut off the fuel pump. So in most cases, that circuit between the ignition and BCM is breaking down at the ignition hall sensor and causing the BCM to send a message to shut the vehicle down. In a lot of cases you may only have to do a relearn procedure. You can download this in the link in the paragraph above.

So if you are doing any swapping (ie PCM's; BCM's; steering columns or other parts in the anti theft system) everything will have to match up. As an example - if you swap in a 6.6L Duramax for that gas guzzling 8.1L, you would use the PCM from the 6.6L but probably want to keep the BCM and ignition you have. The old BCM and ignition wont match what is in the 6.6L's PCM so you would need to do a relearn or have the ignition and BCM from the 6.6L doner vehicle. Three key components have to be on the same page: Ignition "Hall Sensor", BCM and the PCM. The relearn procedure should put all of these on the same page if you have no failing components.

And here is my disclaimer:
I hold no liability or responsibility in the information provided here or in the video. I am posting this information as guidance for people that are having issues installing remote starting systems or GM vehicles not starting or dying for no reason. If you use this information to bypass your vehicles anti-theft system it will do exactly as it says - bypasses built in anti-theft protection. Do this at your own risk and discretion.