take it to a mom and pop shop------
My 2007 Impala was wearing the inner tires.
So I bought the camber alignment bolts and put them in.
I then took it to Pep Boys to get a 4 wheel alignment.
When I left- I looked at the paper- and the before and after specs for the rear camber where exactly the same....
I got home and inspected the rear- they didnt even touch the camber bolts.... as I noted their position... I mean, I installed the darn bolts...so I know where I Left them.
I didnt even bother to take it back to Pep Boys.....why
I specifically told the guy I had installed Camber Alignment bolts to the rear-- and needed that adjusted.... he didn't listen.
Maybe they'll listen when I stop spending my money there.
I ended up adjusting the camber bolts myself...... you know-- by 'eye' so that it wore the unworn edge more.
Drove the car like that for many many miles... now with even wear-- as the tires no longer showed funny wear for the rest of the time I owned it........... eventually sold it and bought the Nox.
this was the factory- vs the adjustable one----- with that lopsided lobe that allows camber to be adjusted. (these are for IMPALA)
Full turn- you can see the amount of movement with the clean metal surface.