Holy f*cking hell, could GM have put those bastards on any tighter?

I am trying to remove my wiper arms (the whole arm assembly) to fix a sweep problem...but those wipers are on there like you couldn't believe!

I've searched this topic before, and people have said "Just buy a top post battery terminal puller". Yep, thats what I am using, and its still stuck. My puller is actually deformed now because of this

So how the **** do I pull these bastards off? WD40? I would hate to have to go to the dealer so they can charge me $70 to "diagnose" the problem

 

I had to replace an arm cause the spring in it was sprung and would not contact the windshield fully.
I took the bolt off, got a big dam screwdriver and pryed it up and it will POP off. You might try some PB blaster on it if it is being difficult.

 

I had to take the drive side arm off in my old camaro because the splines got stripped and it wouldn't turn anymore. Came off with just a wrench and some arm muscle...I wonder why its so hard on yours