I went to change the spark plugs on my Trailblazer for the first time the other day. I had first read every thread and watched every video I could find to prepare. From what I could tell this was going to be a relatively easy thing to do. However, when I went to remove the induction coils I found that they would not come off. I tried pulling them off like I saw in the videos, it looked so easy with the guy reaching in with one hand and pulling them off after unscrewing the bolt. I thought I was going to damage the boot with how hard I was yanking on this thing. It would not budge. It is as if they are glued onto the spark plug. Is there some kind of trick I'm missing here? Do I need to push, then twist, then pull or something like that? Anybody have any suggestions on how I could get these things off? I would rather not have to buy new induction coils as these seem work fine and they are depressingly expensive. Any help would be appreciated.