1998 gmc sonoma alarm

Oops, sorry the question is how to shut off the alarm

Click on a button

What do you mean click on a button

I don't have a key fob, only a manual key, and somehow I'm locked out from even starting the truck, trying to start it doesn't do anything

Nope, It's the same key as before, and what do you mean about it being in the anti theft module, do you mean it might be broken?

So how would I go about getting it to recognize it, because that seems to be exactly what is happening?

Ok, I actually will be getting a second key soon, the previous owner didn't have it on him when we bought it, so I might be able to do that method once I get it, thanks for the help I really appreciate it, so why would it stop recognizing this key when the alarm started going off?

Must have been something I did while working on the stereo, but yeah, hopefully that second key solves all of this

Remote won't program truck goes into program mode have five different remotes 2000 GMC Sonoma keyless entry has 2 kinds that macth.