They are a pain. You can use a 1/4" drill bit and drill them out....and repalce them when you put it back in. Remember you should be able to get a picture of it by reaching toward the back of the engine compartment next to the battery....might take a couple dozen to get it, but it might be easier then tearing the inner-fender out.
Thank you for the response! But I was putting in a jet chip and had to take out the ECM, just pray to god you never have to do this.. It took me 4 hours to get it out and back in, it is in the most ridiculous spot and is almost inaccesable from the top. Before I tried to remove the battery tray, but that is even more ridiculous to remove WOW! Finally I got it in but man what a pain.....
On of the Y shaped insert tool remove works and you may be able to reuse it. If not local auto parts stores sell a product simular but you dont need the $$$ rivit tools. Its more like a anchor you use in plaster walls that when you tighten the inner screw it expands to hold.
After having it done for about 3-5 times it takes me 20 minutes through the fender
First time it also took me all morning going through the engine compartment! Back in the day I had no clue about DT! All I thought was there is no F$%#in way that this is the way to do it.