How to change spark plugs on a 2003 Alero 2.2?

I basically know they are under that plastic cover on the engine that says %26quot;2.2 ecotec%26quot; on it, but I cant figure out how to take the cover off. I Undid the four bolts but something is still holding it in place.How to change spark plugs on a 2003 Alero 2.2?If you took the four bolts out then thats it, there are four spark plug boots underneath so its gonna take a little prying/pulling up on the ignition coil pack to get it loose