need to know what alarm this is

are you wanting to know so that way you can just plug in another unit without having to do the install all over? if so, just get another dei unit of almost any type. the wire colors will be the same. just hook up the new one color to color or go right to where the other wires are connected in the truck and connect the new ones. i would just get it done over professionally anyway. that rats nest under there is a horrible install. that installer really didnt take pride in his work did he?

the added wires look strange, but i gotta say the 2 plugs are DEI for sure. i say get it redone properly anyway. thats a mess under there

clean install would have been you would have had a hard time even knowing which wires were added and which ones were factory, you would have actually had to "look for the siren", and once you did find it that ugly red wire coming out of it, which on that install is sticking out like an elephant at a tea party, would be covered in split loom tubing and also grounded inside the truck with every thing else.

im not really trying to destroy whats on your truck. im simply saying if you get it done again, just make sure you get it done right. after all you like the truck and want it to be nice right? and whats the purpose of even having an alarm if its easily defeated (siren where a blind person can see it) by someone whos not even a good or professional thief?