ct 3300 on a pontiac gp 2002

The Drivers door lock switch controls all the locks in the car.

The switch on the door does control all of the door locks in the vehicle, however the wires you are referencing control only the driver's door actuator. Which is why Xtremej posted what he did. I am by no means a GM expert, but to my knowledge there is no factory alarm arm wire in that car. The factory alarm arms either by the factory keyfob or by pressing lock on the door with the door open and then closing the door. You could try sending a pulse to the door trigger at the same time it is locking which would make the vehicle believe it is open. I do not however know if this would also trigger the factory alarm if you were to press lock again once the factory alarm is set.Installer, IT support, and FFL. I need less hobbies.

Twlevotz is correct on how the alarm functions, it seems as if you are quite intent on arming the factory alarm. If so the procedure posted above is correct lock the door when it is opened and its armed. use the disarm wire off of the remote start to trigger the ORANGE / black disarm wire. Or try to pulse the door pin to think the door is open while locking the door with remote, you could use the arm wire output from the remote start. Not a 100% sure the pulse to the door pin will be long enough as I have never tried it so it may be an experiment for ya.

I try it out this weekend. thanks guys.