long block

  1. 2

    Advice on engine replacement

    I’ve got a 2016 Yukon with 128k miles. I’m pretty sure I’ve got a collapsed lifter. The problem started with the engine seruosly bogging between 1000-1500 rpm - and within less than 10 miles - it was making a very long tapping sound under the drivers side valve cover any time the rpm’s drop...

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