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JJimsYukon replied to the thread 2023 Yukon Denali 3.0L Diesel Whining noise from engine.Update on whining noise. Turns out the alternator bracket had come loose which put lateral stress on belt tensioner and idler pulley...
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JJimsYukon replied to the thread Wow great mpg.I have a 2023 Yukon XL Ultimate with the 3.0 Diesel and 14,500 miles. The best mileage I've gotten is 38.3 mpg (on my dash display) on a...
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