remote start, no transmitter

.1% is a bit optomistic, probably closer to 0.000000000000000000000000000000005%.   

The one thing you have going for you though is it looks like the back of the unit has a wire guide on it (identifying what each wire does).  That should make it fairly easy to install a new unit - just match up the wires and splice away.

I 2nd this post...I have been lazy in the past and unplugged old units and wired new units to the wiring...Have done it a few times...But  some of them had to come back for wiring connection issues...(original wires were not connected very well...)...So as worm said trace wires up...If they appear to be a good connection......Make your decision at that point whether to re-use old wiring or remove it...But as stated the wires are already labeled and found...Cant get much easier either way you go...! And pay attention to polarity(like - parking lights and such...!)  Just a 2nd thought here...Does the truck have factory keyless...And in the wire descriptions...is there a wire that says something like - instant start... Maybe if this wire is available, we can activate the remote start with a relay or a trigger...?? and then nevermind the remote or replacement!