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defroster

Discussion in 'General Chevy & GM Tech Questions' started by bke05, Jan 13, 2009.

  1. bke05

    bke05 New Member

    Hi, I have an 06 trailblazer 5.3L. The problem is, when it's cold outside the front defroster will whistle, during acceleration. It quiets down after awhile, but is still there.
    Thanks.

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