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  1. #1

    Default weird vibrations

    My 04 tahoe4.8l, has gotten an odd vibration at 1300-1500 rpm through all the gears. It sounds like metal vibrating against other metal. I have checked both converters and can't get them to rattle also went along the exhaust system, no luck. It only does it from 1300-1500rpm then it is quite no problems other than this. please help

  2. #2


    check the heatshield on your muffler, its usually tack welded on and these welds can break after a while. Mine 95 did that and it was the cat. I ordered a new cat and the tranny went! so that fixed my problem.
    1999 GMC Sierra 2500 350 vortec
    1967 Jeep M725 ambulance 230 tornado
    1990 Cherokee Limited- 3 inch lift on 33's
    ...and every one of em has issues

    If you have any questions or problems don't hesitate to send me or any other GMTC moderators a PM

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