Acadia v6 2018 rear diferential always make a bearing nois afther 2000 km they replace it 7 time but never find ithe issue anybody encounter something like that. Alway break rear passenger side

Dealer wont do anything more

also metal in oil all the time

Lemon law?

I was thinking the same thing.

I would verify with your states lemon law on this matter. 7 times is too many. 3 times is too many.

OP, apparently your dealer is not familiar with Einstein'* definition of insanity, you would think they would have started thinking outside the box after the 2nd replacement of the rear differential, maybe starting with a frame and body shop to ensure that everything is square and lined up. Other than trying another dealer, as others have suggested maybe the lemon law will be your only recourse.

What the others said ^^^^^^^

. . . and: take it to another dealer. Replacing the differential seven times is bad diagnostics.

Also, call GM and open a case.

How many miles (or kilometers) are on it?