2008 GMC Acadia rocks back and forth going down highway. Is this a strut issue as we've already put new tires on it,
2 Answers
It might be bad shocks or struts. Try bouncing the car by hand and if it bounces rather than settling down immediately they are probably worn.
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Worn upper control arm bushing at rear of car .Jack the rear end up and stick a pry bar under the tire .you will see it move slightly.
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