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Lots of stuff in the way. Hard to put back together. Huge PITA.
But don't believe that a shop will do it better. Unless you've used them before and really trust them. Most shops just don't care as much as you think they do so when they put stuff back together and it's not exactly right they won't worry about the buzz or vibration that you now get. You can't believe how many extra fasterners a tech will have on his tool tray after one of these jobs. And some don't care. Don't get me wrong. There are plenty of good guys out there. But even they will not go back if they forget a fastener if they are 3 steps beyond and it won't matter in the operation of the vehicle. Their bosses would kill them.
If you do it yourself (Try to find someone on here that has done) and document it step by step.
Take lots of pictures. Buy a box of plastic lunch bags and put the fasteners in groups and label them. Nothing sucks worse when you use a screw that fits and then later down the road you needed it for something else.
As you disconnect cables use a piece of masking tape to out the same number on both sides of the connection so you make sure you get everyone back together right.
Try to use the pictures you took and put everything back in exactly the same order you took them apart even if you think you can do it a different quicker way.
I know this all sounds like a giant collosal waste of timr, but in a couple week when you don't have a virbration or buzzing from underneath the dash you will forget about all the extra time it took to do it slow and careful.
I know that sound tedious, but in the long run will be worth it.
Lastly, no matter how hard you or a shop try it never may be exactly the same as it was. That dash was originally put inwithout anything else in the vehicle. And it's been through several hundred heating cycles so now it is shaped different than it was at the factory and is really custom fitted for your individual car. Bending and torqueing things out of the way was never planned on.
Good Luck
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