re: Anyone replaced all steering/suspension joints on a GM truck?

Did it on mine. Drilling out the rivets on the ball joints is a pain in the arse. Best way to get the Pittman arm off is to pull the gearbox off and put it on the bench where you can get on it good. Tie rods are a cinch. Drilling out the rivets sucks big meat balls.

Eta: the idler arm was easy on mine, but it might have been because of the lift. You need a puller and an impact to get it off though as well as a badass soft hammer to get the Pittman arm back on. The shaft is tapered and you have to beat the frick out of it to get the arm all the way on. Chances are the clunk is from slack in the joint in the steering shaft. Don't be surprised if you do all this and the steering wheel still has some flop to it.