Start by checking all the fuses that power the BCM. Sounds like you may have fried the BCM or the ignition switch by pulling to much current if you didn't blow any fuses. Anti theft is controlled by the BCM. If proper key data or transponder in not being seen it will shut down like that.
If the brown wire comes from the ignition switch you could have over loaded the switch and damaged it.
You should have used a relay to switch the constant +12v with the acc. wire as the relay positive trigger.
DBALL2 was proper programmed and tested.
Vehicle still started with key after DBALL2 was installed.
Did the remote start work normally prior to you connecting to the brown wire.
Try pulling battery negative for at least 30 minutes after you have made sure you didn't blow any fuses.
Money is on a fuse in the underhood fuse box labeled Ignition. Cant recall which one, but start looking there.
Do a google search for the GM Upfitters guide and give that a download. Shows you that the only safe accessory power source in the truck is located in the lower junction box located directly above the drivers left foot. Pull the cover off and one of the empty pins on the left side of the box is accessory power fused at 15a. TEST! THE! PIN!
You can use a standard female terminal to push onto the empty pin.
I have used the brown ignition switch accessory wire, but remember to install a diode across the relay coil or you will be spiking a ton of voltage into the BCM.
Much easier to use the upfitter panel for accessories, and if a dealer gives ya grief you can stick the upfitters guide to their forehead to shut them up.
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To master and control electricity is perfection. *evil laugh*
There is a blown 2 amp fuse in one of the fuseboxes.
Update:
The issue has been resolved thanks to you guys
The problem was a blown "DLIS" 2 amp fuse located under the hood.
I have connected the power windows using a relay and getting the accessory trigger from the upfitter panel like racejames76 suggested, I DID TESTED THE PIN
I appreciate your help: lurch228, racejames76 and i am an idiot.
Thank you.
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SGARCIA1212
Good to hear it was just a fuse.