Question about 2002 GMC Yukon XL

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2002 Sierra 4x4 while driving around 45 and up, humming noise

Sounds like a low drone wind sound. Stays the same from 45mph to 75mph.

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This is possibly a wheel bearing problem.
A simple and effective method of finding the problem bearing, is to jack up the vehicle, one wheel at a time, and check for play, by holding the wheel like you would a steering wheel, and just apply gentle 'opposing' pressure with both hands. If you hear any knocking sounds, or feel any 'play', then you've located the problem area.
There ya go:)

Posted on Jul 27, 2009

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Posted on Jan 02, 2017

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