1999 Chevy Suburban C1500 v.8 5.7 liter - alignment problem

We are suddenly having problems with the sub pulling to the right while driving. My husband suspects the tie rod needs to be adjusted. The front passenger side tire is toed out farther than it should be and you have to hold the steering wheel to keep it from quickly spinning right, thus dragging the sub to the right.

Does this sound like a tie rod problem? Is there anything we should be particularly careful about when adjusting this?