05, z71, 5.3, engine making a knocking sound

Discussion in 'General Tahoe/Yukon/Escalade Discussion Forum' started by Luke05z71, May 20, 2020.

  1. Luke05z71

    Luke05z71 New Member

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    May 20, 2020
    I have a 2005 4x4 chevrolet tahoe with aprox 185k on it. My engine has started making a knocking sound after running for a little bit. I put a heavier fully synthetic mobile1 oil weight in it along with the Lucas oil stabilizer, and it doesn't really make a difference. Currently, there's no engine light on. Everything is stock with the exception of a small leveling kit.