Have there been any reports of transmission issues with the 2010 tahoe

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Our Tahoe currently at dealer,over past two weeks the Tahoe would not go forward when stopped at traffic light. Car was towed both times. Dealer first time kept car 4 could not find problem. 3 days later second time occurred and after sitting for a day at dealer it now goes forward again. Dealer unsure of issue wants to replace trans. Anyone else have similar issues?