[bell]

Here's what to do........
Drop the underside of the dash under the steering wheel.
Them look for the small wires coming from the area of the led, the led will go strait to the brain of the alarm.
If it's a decent install everything will be wrapped on black tape, and zip tired to the stock harnesses.
Once you find the brain unplug it, if the truck starts then you can leave it as is our take the time to follow disconnect and secure where they are tied into the truck harness.
Near the main harness under the dash you should find the relay for the starter kill, again will probably be zip tied.
Don't be afraid to cut zip ties, just be careful when you do that you don't cut any wires at the same time.