The pitman arm connects the steering gear to the center link. There are two kinds of pitman arms, non-wear arms that have no moving parts, and wear pitman arms that have a ball stud and socket. One end of the pitman arm has a splined hole that fits on the steering gear sector shaft. The other end of the non-wear arm has a tapered hole to accept a tapered ball stud from the center link. Non-wear pitman arms are generally not replaced unless damaged in an accident or if the tapered hole becomes damaged. The ball stud and socket can become worn on wear pitman arms.
Moog Problem Solver products incorporate proven design and engineering features to ensure like-new steering, ease of installation, and extended service life. MOOG is the preferred steering and suspension parts brand of professional technicians. The replacement pitman arms by MOOG have been forged from premium materials to exact OE specs and they're capable of withstanding high stress conditions without breaking and leaving you stranded. more details on - https://www.carid.com/moog/steering-pitman-arm-mpn-k440019.html
MOOG K440019 PITMAN ARM 2011-2019 GM 2500HD/3500HD