Re: Both rear control arms!! Are you kidding?!
I agree with the suggestions about having another shop look at them, without saying anything to them about being told they were bad.
Do you have abnormal wear on the tires, or any handling problems? You mentioned 63000 miles. If these were still the original tires, I doubt if you have any suspension problems. If the old tires looked good, I wouldn't worry about what you were told until you actually confirm that. No abnormal wear on the old tires would mean I wouldn't replace the control arms, yet alone even get an alignment. I would watch for any unusual wear and rotate the tires every 5000 miles.
The Buick Rendezvous, if I recall, had the same type of situation if a bushing went bad. You could not replace just the bushing, you had to do the whole assembly. If you do find you need replacements, I suggested you contact one of the sponsors on the Acadia board. His name is Schram Auto Parts and he deals in late model GM vehicles. I purchased parts in the past from him, and was extremely pleased with the quality, price, and service.
2010 Summit White Traverse LTZ, SOLD 4/2012 <br />2015 Traverse 2LT Siren Red Tintcoat-36 Month Lease