Shake when stopping

I have a 2002 Pontiac Montana. Recently when I come to a stop I have noticed there is a side-to-side shake I can feel through the steering wheel. I believe this is caused by at least one of the outer tie rod ends being bad. What do you think?

could also be tires. i had some tires on back and that shook the van and made the steering wheel shake back and forth. After a new set of rear tires, it was all good .

I have had the tires balanced and rotated, and check for problems. I am going to replace the rotors this weekend and see if that helps. Any other ideas would be welcomed and appreciated.