Ok so yesterday I had to leave my truck behind because it wouldn't stay on let me explain. I had an aftermarket alarm and remote start put on my 09 sierra 5.3 and worked fine for 6 months now when I went to turn the truck on it started then after about 3 seconds cut off. I also noticed the security light stays on solid when the key is in the ignition. Not to mention after a couple of tres to start the truck with my key, it quit working(the key) but the remote start would start the truck for a couple of seconds. Any ideas? Remove the alarm?