Is there a way to bypass the security system in this specific make and model and year of truck? When I brought the truck home after purchasing it there were some minor repairs. The truck was in running condition. Here is what I have done so far uptodate. I replace the front hub, replaced spark plugs, put in a new fuel filter and also replaced with a brand new battery from one that was weak.
Upon doing all of these repairs my truck will not start. The security system is now turned on and I would like to turn it off or bypass it somehow. When I pour gas directly into the carb, the truck will start but it will idle very rough and then die. I am pretty sure it does have something to do with the security system. Any help would greatly be appreciated.

https://www.gmforum.com/electrical-1...2-99-a-279119/

the security light on?

the only reliable way is to disable it is to send it to blackbear or similar and have the security disabled in the pcm

My only problem with this is my ignition key does not have a chip on it whatsoever.
What is the pcm or where is that located so that it can be disabled.

everyone keeps referring to a car my problem is with a 199 GMC Sierra 1500 4x4 truck.

yes the security light is on and it stays on it does not flash or anything. even my door locks do not work or my remote alarm.

now it sounds like you have a aftermarket alarm screwing things up. a 99 new body style should start and shut off a couple seconds later if vehicles security is bad and the light blinks. thats it. the other stuff means something else is wrong. possibly bad ign, or aftermarket alarm