I also did !AIR/!EGR on my car a while ago, I just took the whole vaccum or whatever the hell it was that went all the way down into the fender area out, havent had any problems yet, still have the ses light on becuase of it, but I havent had the time to get anywhere to have it deleted with the LS1edit program so, but my buddy also did the same on his 99 SS and hasnt had a problem with it either. You just need to go from underneath and undo the 4 bolts on the trap door looking thing and get in there and unbolt it, realtively easy, took maybe a half hour tops, unless your mechanically challenged, which if you've allready started this then obviously your not, but thats the way we did it to our cars, its a little bit of a weight reduction if you wanna call it that, but its easy enough to do, the hardest part is getting a socket in there and finding the heads of the bolts, otherwise its a very simple process. Hope that helps. have fun. later
Cody