2004 grand cherokee limited transponder

if the rubber on your key is grey then you have a chip in it, to test for a factory alarm roll the dr window down  lock the doors wait a few mintues then open the door from the inside handle, if the horn goes off you have a factory alalrm,

you can use the d.e.i piece xk531 it does door locks and transponder bypass

you can also use a 555c to bypass the chip, or a 556u will also bypass the chip but you will loose a key, and then use a 455j which does door locks and alarm bypass

I always use the 555c and the 455j with no problems

look it up at www.bypasskits.com or www.xpresskit.com

or try www.idatalink.com they have good modules to

i dont know much about the fortin stuff it looks like it will work