Good question: Generally the hitch designs are very specific to each vehicle. Not to say there may be universals available, but I would want a Mopar. Based on part #s alone, I think it would be safe to say NO. The part number for the KJ is 82213554 & the part for the GC is 82213553. What the differences are I have no idea. If you are after a hitch for the 2003 KJ, why not simply look for the correct one in the first place? Or do you have a GC hitch you would like to make fit? BTW the kj's had a recall for a free hitch to protect the rear gas tank in case of a collision. You may be entitled to a new one for free. (not sure if it includes the receiver or not though) Type your VIN # here to see if you have the outstanding recall. https://www.mopar.com/en-us/my-vehicle/recalls/search.html
