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Bruce Diamond

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  1. Bruce Diamond
    My 2025 Sierra is in for the second time for an oil leak on the 2.7 TurboTax. First was at 3000 miles although I think it was leaking when new. They replaced the rear main seal. Days later I had the same leak. Back to the dealer and they diagnosed a faulty rear main seal. I have been truck less thirty days between visits and the dealer can’t get the needed parts. I’ve already filed a case with GM for them to buy it back. Beyond disappointed and frustrated. Today is the 5th and the part eta is 6-16th.
  2. Bruce Diamond
    I have a 2025 Sierra with the 2.7 turbo max. Took it in for state inspection at 2800 miles and was told there was an oil leak. Made an appointment for diagnosis and was told it was either the rear main seal or upper oil pan. I left the truck and was given a loaner. Week and a half later they replaced the engine rest main seal housing and I was told it was fixed. Two weeks later it’s still leaking. Going back to leave the truck until it’s fixed. I’m very disappointed and concerned to read of others having the same issue. If it continues I’m going to push for my money back or a new truck with the 5.3 V8.
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