Originally Posted by 32krazy!
you dont have to take the bumper off. remove the pass. wheel and then remove the front inner fender . its about 6 or 8 screws and bolts. once its out you have a ton of room to work in. also the oem clamps suck so just twist them off and replace them with worm clamps
Steve is right, it's 2 torx screws and 4 plastic top hats (plastic nuts that look like top hats when you get them off). You'll have to remove the splash shield to get to two of the hats. I have one sitting in my garage so if you need photo's I can get you some.
Edit: after rereading your post I realize you're not trying to remove the pump through the wheel well door. My bad