Truck wont start

['87 Static Slam]

My truck is possesed by DEMONS!!

it basically starts when it wants to. my lights work, my stereo works, my air blows, but nothing happens when i turn the ignition. i can close the door and come back an hour later and it fires right up. it does this when its cold and hasnt been driven in a week, when its hot and i just stopped at the store, it does it for no apparent reason.

i think it may be that my alarm is not re-engaging the starter. All i do is close the door, set the alarm, and let it sit for a while. then i come back, de-acticate the alarm, get in and it starts right up.

i have taken it to a shop to be checked but it never does it while im there, the shop guys look at me like im crazy saying "it starts right up".

Could this indeed be my alarm? is there a way to disconnect the the starter dis-engage on my alarm?

thanks ya'll!