Question about 2003 Chevrolet Blazer

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2003 Chevy Blazer 4x4 making howling noise in front end.

I live in Calgary Alberta Canada. We have crazy weather...from extreme cold to chinooks. I have noticed that my Blazer is making a howling like noise when I get to about 50 km's. I noticed it more when it is in 2x2 or 4x2. Can you PLEASE help me out!! I am a female and would like to hopefully narrow it down to a possible fix before I head to a mechanic. Any and all advise would be greatly appreciated!!!

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  • cindy164 Feb 17, 2009

    I took it to a mechanic and they said it was a faulty left front tire? Some other mechanic had told me that it was a bearing but thank god I took it to the other guy. I know from previous experience that a bearing would sound louder as you turn...this is not the case for me now. It is also not getting any louder. Any more tips...

  • cindy164 Feb 19, 2009

    How difficult is checking the diff and the transfer case? For that matter all the front end fluids? I won't be doing this myself as I am a female but to take it to a shop what is the difficulty level? How much Canadian should I pay to have this looked at?

  • darknessf0 May 11, 2010

    The most likely cause of the howling is your transfer case not having enough lubricant inside of it. Do you drive often with it in four wheel drive? My girlfriend was having the same problem with her Blazer, and that's how we fixed it.

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As stated above, check the transfer case fluid level, also check the fluid in the front and rear differentials, make sure it is full and clean. if the howling still exists it can also be caused by hub bearings, or differential bearings.

Posted on Feb 17, 2009

  • Nicholas Csorba Jr. Feb 18, 2009

    a howling noise can be caused by uneven tire wear. some reasons that would cause tire noise is a vehicle that is out of alignment, cheap tires, loose or worn suspension components and how the vehicles is driven. if you run your hand across the the tread it should feel uniform with no abnormal raised parts of the tread, if you see what appears to be a sawtooth pattern or high and low spots, that can and will create a humming noise while driving and it will be more noticeable at highway speeds. if your tires seem ok then it is quite possible that it can be a bearing. but start by checking the tires first. also check the transmission fluid, your owners manual will tell you how to do that.

    hope this helps!


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