Windows and locks do not work?

If I understand this issue then you are not able to pull codes because the ignition will not turn on? If that is the case, then we need to check power going to the body controller because the way this works, is the BCM just gets the switch button input and it is literally just an open closed switch. So when it is close, the BCM sees 12 volts on the ignition mode switch input and that tells it that someone just pressed the button.

So this means we need to make sure Fuse BCM 6 is not blown. If it is not, then we need to check for voltage on the BCM connector X2 pin 17. This should have 12 volts when you press the button. If it doesn't then you need to replace the ignition mode switch. If it does then there is an issue with the BCM.

Here are some guides that will help with this:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-check-wiring

So when the BCM gets the input signal from the button it sends that info to the PCM and tells it to start the engine.

Let's run through this material and find out what we have and we can go from there. Thanks

Bummer, I had to hang a picture on the wall put a wood screw right into a water pipe, yep I feel your pain. :) If you fixed the wiring and all fuses are good it sounds like the BCM has blown out here is its location you will need to have it programmed in at a shop it should cost about $130.00 once you have the new one here is the BCM location.

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken

Please let us know what happens.

Cheers, Ken

These issues are most likely the same issue. If the lock button is not responding but the door doesn't unlock or lock then it is most likely caused by a faulty actuator. The slapping of the door panel was getting it to operate then yes, it is sticking. That is not uncommon for these when they begin to fail.

I attached the process and as you can see, you do need the door open so I would suggest you get the door open and then make the repair. If you cannot get the door open then you may have to cut a hole in the panel to unlock it so we don't want to push it with the door not opening.

See I f it will open from inside or outside to get it open otherwise door panel will need to come off and see if there are broken clips holding rods on that go to door handles unless lock actuator isn't working but you should be able to unlock form inside. Cold be a broken cable going to door latch as well

Very happy you asked that before just doing it. Too many people still think there is something that will magically "reset" based on the stories of that working on much older GM cars. I heard of at least one 2008 GM car that everything worked normally on after the battery was disconnected, and that made me happy, but there are way too many stories of various computers locking up requiring a tow to the dealer to have them reprogrammed.

You aren't going to solve an intermittent problem by disconnecting the battery. "Inconsistent" can mean a lot of things, but if the locks work properly some times, the programming in a computer is not the cause of the problem. On Volkswagens, BMWs, and 2002 and newer GM products, I would never suggest disconnecting the battery, but if you're going to try that, I would do it in the dealer's parking lot so you don't need to pay for a tow if it doesn't start after that.

Good afternoon,

The locks are controlled by the body control module. The switches send a signal to the module and then the locks will work from the module.

If you have a scan tool, you could monitor the live data in the BCM to see if there is a signal sent from the switches.

If there is, then the BCM is the issue.

If there is no signal, then it is the switches.

Roy

If the problem is with the same door all the time, chances are the actuator for the lock is going bad. You need to check to see if 12v of power is going to the affected doors. If it is, then the actuator is most likely the problem.