Here is a very detailed tutorial for installing a new single or double din stereo in your Hyundai Santa Fe. The wiring harness was perfect but I would not recommend the trim kit that I used in this video.
Also if you are looking for a very nice stereo at a amazing price I highly recommend the Pioneer FH-X730BS
I couldn’t be more pleased with all of this stereos options. I even purchased mine second hand and it was a great buy.