OK, before anyone yells and tells me to put this in the write up section, This is merely a link to aid in those who are searching. I will be doing mine in the next month and will add my supplements to this. I have had a great deal of pain searching to find a good writeup with pictures that aren't removed or broken and this is the best i have found. This is for the newer body style where you MUST remove the dash to get to your heater core and AC Evaporator core. This guy removed his Steering Wheel and Column. You do not have to.

http://buckeyejeeps.com/stuff/XJEvapReplacement.pdf

 

I had mine done at a repair shop. Best $730 I ever spent. I've fixed just about everything on that jeep myself. Glad I didn't touch that.