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  1. #1

    Default 2005 Chevy CrewCab with Harmonic Sound

    I have an '05 crew cab that I have had some severe tranmission issues with in the last 18 months. I am on my second tranny and third valve body. Now I am getting a harmonic sort of humming sound that has progressively gotten louder over the past several months. Any ideas on what it could be?!


  2. #2
    Master Mechanic CarpenterGuy's Avatar
    Join Date
    Jul 2008
    Leeds, Alabama


    our car had a humming and it was the wheel bearings, so check those out.
    2006 Silverado Z71 - 97,000 - totaled, RIP
    2006 Silverado Z71 - 122,000 (K&N 77 Series CAI, PowerAid TBS, Magnaflow dual rear exit, 33x12.50 Mickey Thompson MTZ, Tuff Country Torsion Keys, Tuff Country Add-A-Leafs)
    1966 C10 swb stepside (Gen I 350, Turbo 400 trans, dual cyl power brakes, front discs)
    I'll keep my money, guns, and freedom. You keep the Change.

  3. #3
    Sr. Apprentice
    Join Date
    Aug 2008
    Loganville, GA


    Quick way to check if it's wheel bearing noise: Drive along at 30-40 mph, as you go around curves, the noise should get louder when turning one way and quieter the other. of course if both bearings are bad it may not get quieter...The only other thing to do is determine if it is from the front or rear.

  4. #4

    Join Date
    Feb 2008
    Red Wing, Minnesota, United States


    an easier way to check bearings is just feel the center of the rim/hub if they are shot it will be pretty hot
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual

  5. #5


    The C/K vehicles are hard to diagnose the bearings by driving, much easier on the cars. I usually see the bearings on those very loose along with a noise. Lift the front of the vehicle and put a hand top and bottom of the face of the tire and try to move in and out. It should be pretty loose if its starting to go.

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