They seem to be talking about the "idler arm" that is the name most of the world uses.

Idler arm.

I would question the need for the pitman are, they seldom go bad.

or nah?

I went to get an alignment for my 2000 Tahoe.The shop that I took it too speak Spanish & they says I need to replace the brazo auxiliaro "auxiliary arm" & the pitman arm....but I can't seem to find any parts when I Google "Chevy Tahoe auxiliary arm" if someone could help Me to find the proper part name in English,Thanks!