I have a 05 Grand Prix with a 3800 series three supercharged engine. Trying to replace the water pump. Got all the bolts out, but the large bottom right bolt is loosened, but cannot be pulled out enough because the head hits the back of the smooth idler pulley for the supercharger. I cannot figure out how to remove that pulley. It looks like there is a mount that can be removed but I can't seem to find the bolts hold the mount on. I removed the bolt in the middle of the pulley hoping it would come off but it is pressed on and I can't get a pulley puller in the engine compartment. How the heck do I get this last bolt out?

Other forums have mentioned a t50 torx bolt that is somewhere holding this pulley on, but I don't see that anywhere. Someone please help!