Question about 1999 GMC Jimmy

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Drive noise like tires howling

I have a 1999 GMC Envoy and when I would drive it at any speed I could hear a howling noise like the tires were way too noisy or aggresive. So I took it in and put on a set Goodyear Wranglers. Needless to say the sound didn't go away. So I took it back a week later and they replaced them with a very good set of tires that were supposed to ride smooth and quiet. That didn't help much more. So they checked it out and said that even though they checked the wheel bearings they really didn't seem too bad but feel that is the problem. I know I have to install ball joints and have installed all new brakes and shocks. Do you think it is the the wheel hub bearings or have any other ideals?

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  • robo2023 Jan 01, 2009

    I've searched for different hub assemblies online and the prices for like items are all over the board. Any suggestions?

  • robo2023 Jan 05, 2009

    When I use the heater in my 1999 GMC Envoy/Jimmy, it tends to cycle from hot to cold by itself. It sometimes gets too hot, but when I try to adjust the temp or blower it goes all the way cold. When I adjust and re-adust the heat comes back on. I've replaced the theromostat and the coolant is full. Any ideas?

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Definately sounds like wheel bearings

Posted on Jan 01, 2009

  • Ramondo Elia Jan 01, 2009

    first thing is try to decifer where the noise is comming from. I wold check at local Autozone that usually have it. You will need the entire hub assembly, as that is the only way they come because they are sealed units.

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Its more than likely the wheel bearings...if its a howling noise you dont want to let it get any worse

Posted on Jan 01, 2009

  • Ronnie Houston Jan 01, 2009

    you could try to repack the old bearings to try to make them last longer or go to an auto parts store and try to find a not so expenxive set. i know they are expensive but its fixing them or losing the truck...

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