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Find FAQ and support for the myChevrolet, myBuick, myGMC and myCadillac mobile appsNew Topics from OnStar Subscribers
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my GMC app not working after OnStar activated and GMC.com says OnStar no active in my account??
just purchased a 11k mile 2023 GMC2500. Activated OnStar via truck cabin button and shows active in the vehicle information center. My GMC account shows no OnStar active and MyGMC mobile app keeps ...47KViews2likes11Comments
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