I have a 2006 Equinox lt and it makes a loud humming noise when I exceed above 40mph and also does it when I slow down from 55. Mph to till about 40mph. At slow speed absolutely fine .
Might be a wheel bearing, or the tires themselves.
1 out of 1 people think this is helpful.
Mine is doing the same thing. I replaced the wheel bearings and it still does it. Did you figure it out?
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