It's hard to judge the level experience/ability needed to do this job yourself. It's is a hard job, but literally its just a bunch of simple jobs one after the other, strung out to be one overall long job. And that is where you could get into trouble, if you don't have the experience/ability, you might break something because you missed something, or when it is time to put it all back together, you get totally lost or miss steps putting it back together. Organization as you do the job is key.
Plastic sandwich bags, with a roll of tape, as you remove each component, put all its fasteners in the sandwich bag and tape it to the component. Believe me, if you throw all the fasteners in big cup, you'll miss fasteners or use the wrong ones in spots as you put it back together.
It can hurt to have a cleared, clean area next to the vehicle that you lay out each component you remove in an organized fashioned. Think exploded diagram of the dash, lay out the parts like that. If throw the parts in a pile, you'll get lost putting it back together.
Cell phone camera, as you take it apart, take photos, especially of some of the complicated stuff, especially routing of wire harness's. You can pull the photos up as reference if you get stuck on how it goes back together. The one that I got stuck on was the routing of some of the wire harness's. (once you get everything out, its just going to be a big rats nest of wires.
Put a piece of duct tape over the steering wheel to hold it in place/keep it from turning, when you remove it. It is indexed and has sensors that effect the ESP/Roll Mitigation and has clock spring that must maintain proper index. When you remove it, the wheel will turn very easily, and its tempting to play with it, don't, it's easy to re-install the steering wheel with a full turn or more off from the index, that result in all sorts of problems. Maybe a broken clock spring, all sorts of warning lights and non-functioning ESP/Roll Mitigation, ABS, etc.
You can perform a self-test on the HVAC unit, the manual you can do the test yourself, the automatic version the test can only be initiated by the high end dealer tool. The self test will tell you if have any problems with the blend doors and the motors driving them. While you have the HVAC unit out and disassembled to replace the Evaporator is the time to fix any problems with blend doors, clear blockages, lubricate the rods, replace bad motors, etc. At least one of the blend door motors is buried underneath the safety impact cage, requiring pulling the whole dash and safety cage to change the motor.
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