Even though this is not hard to find, I am posting the link below so that new people can easily find two very important documents for maintaining the KJ (Petrol or CRD): the Service Manual and Parts Fiche for your particular year KJ.
This is a blind link, ie you can't find it through normal search or through the main site menu, you need this link to get to it. They are large documents as you would imagine so don't download them over a dialup link.
I recommend you download the files for your year KJ and hold them on your PC hard drive/ cloud whatever, rather than going back each time you need them. I have checked and the file links still work. For 2007 models just take the 2006 files as they are the same.
http://colorado4wheel.com/manuals/Jeep/KJ/
Once you have these documents there should be nothing you can't find out about your KJ servicing and parts. You can even print out pages to give to your mechanic. Take the time to learn how to navigate these documents and you will be able to do timing belt changes, service your transmission, change wheel hub bearing, etc etc its all in there. With the Parts fiche, once you learn to use it you will be able to find any part on the internet simply by searching on the part number on Google, or going to a part supplier website and entering the part number.