Have a 92 Blazer that is wandering all over the road. I replaced the steering gearbox and no change. When I bought the truck all the steering components were new (tie rod/ball joints/idler and pitman arm). It’s also been aligned recently. I was thinking maybe when they installed the center link it is either backwards or the wrong length?? I see O’Reillys offers two lengths. Would anyone have any thoughts on this or possibly a diagram that shows the center link? Thanks.

 

Take a look at you upper and lower control arm bushings. They don't last forever. I doubt your center link is the problem if you had aligned. That is something the shop should have noticed. To be honest, they should have noticed if the bushings were worn out, too. Could also be the rag joint on the steering shaft. They don't last forever either.

 

Ditto on checking the rag-joint.