Any input ??
On the GV, the lower ball joint is intergal to the A-arm. You replace the entire A-arm on these. See pic below:
autopartswarehouse.com has them for about $100 w/free shipping.
If one is bad, replace both as preventative maintenance, as the other is prolly long in the tooth. Kinda involved. Must remove the steering knuckle from the arm, spring pops out, yada yada.
Good time to install a Calmini lift, and these replace the old arms with new ones that have replaceable ball joints. Tell your wife, if you have one, its the smarter way to fix it.