Reusing old Clifford alarm in my 1996 GMC?

[rauto13]

I have an old Clifford alarm that I had in an extended cab 1994 Chevy about 20 years ago. I now want to put it in my 1996 GMC extended cab. I want to install this one because it has Smart Windows, remote start, and the ignition kill, along with the alarm. I had this alarm professionally removed before I sold that truck in about 1998.

What I am wondering, is since everything was working when it was taken out, would it probably all still be good after all this time? Right now, I don't have the extra funds to buy a new alarm for this truck and would like to use this one if it will still work. There is a ton of wiring to install this alarm, but I finally did locate the wiring diagram for it. I have wired up numerous stereos and done other electrical work on my vehicles, so I should be able to install it.

Is there any way to check the alarm without first installing? Is there any chance that it is still good? Am I wasting my time?

Thanks for all the help.