I have a 2023 GMC 3500 with Duramax. It has developed an oil leak. I received it in early Feb and it has 3900 miles. The GM service center has diagnosed it to the rear main seal leaking. The parts are available they say. My concern is WHY. If they fix it will it reoccur?? What is your opinion on this? Can I push for a new truck? If so; how? Thanks for your advice