looks like my 92 S-10 is due. Do I really need a puller to change it?

The idler arm is bolted to the frame with 2 bolts. A tie rod separator is used to separate the center link from the idler arm. The bolt holes in the idler arm are slightly oversize which allows for adjustment of the idler arm. Make sure the center link is level before tightening the idler arm back up.