03' Trailblazer Remote Start Trouble

I am installing a DEI 551R r/s into a 2003 Trailblazer. I've done r/s before, but this job is killing me! I know it uses passlock 2, but I don't have the module yet. I hooked up all the necessary wires for it to r/s, but when I try to r/s it, the vehicle doesn't try to crank. I cehcked the starter wire during r/s, and it gets +12v. Anyone have any ideas or experience with this vehicle? All wires are hooked up correctly, I just do not have the passlock 2 module. I would expect the vehicle to at least crank over then die! One thing I noticed, the key ignition makes a clicking noise when I attempt to r/s as if its searching for a key. I tried putting the key in and not turning it on, and still no r/s. =[

Thanks you guys. Much appreciated.