Assuming you have stock pins..go buy some good penatrating lube....soak it for a couple of HOURS not minutes...keep it wet.....try an easy-out first....then if that doesnt work, you can drill it out...if your good with a drill....I happen to have exceptional drill skills ( so ive been told)
I've had to do it. It's not fun. Use a drill press and a GOOD vise. Start small and use progressively larger drills. Pick the threads out of the hole with a dental pick.
Get some aftermarket pins with hex heads, and ALWAYS use anti-seize when reinstalling.