This is a bushings repair fix kit for your discontinued rear left or rear right lower control arm assembly, for GM Cadillac vehicles with air springs or electric ride.  One kit will repair one rear control arm get two kits to repair both worn rear lower control arms.  This seems as the last thing to get looked at or changed after someone changed all your worn out front steering components, and vehicle still handles funny, weird  or not right. I suggest doing both rear control arms by getting 2 of these repair kits.  It takes a bit of time to repair one and not much more time to do the other while its apart.