96 Chevy 4x4 Ignition Failure

My truck  was running fine, then the next day I tried to start it & when you turn the key it want do anything. The dash lights & all the power works it just want start, engine will not even roll over.I am thinking it has someting to do with the alarm. It has a factory GM alarm installed in it.Any tips would be great.

Thanks, Mark

It has a Gm alarm installed but it doesnt look factory installed , I just checked it out, the ignition wire ( KEY ) going into the alarm box is getting power when I turn the ignition, & every thing else seems to be working fine on the alarm box, but still no ignition. I guess maybe the ignition switch is broken. The only other thing is another wire labeled ( MOTOR ) has no power to it going into the box.It plugs into the box along with the wire for the ignition. Could this be the problem? It seems like it should have power to it , at least when you turn the key on.

Thanks, Mark

Yeah, I have already unpluged the unit, It made no difference.

Thanks, Mark

I got it !!!!!!!!!!!!!!  Thanks David . I traced everything possible, Straight down to the starter. I had someone turn the ignition key whiles I checked the power wire going to the starter & thats what it was.

Thanks, Mark