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mechanical noise

  1. unidentified transmission noise

    OEM Issues
    hey all! This is my first time posting as I am a new member. I have a few issues maybe you can help! I have a 2002 trailblazer LS with 4 wheel drive and an automatic. -At aprox. 45mph and 61mph I hear a mechanical rattling sound coming from under the truck right around the drivers seat. I have...