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    My Vehicles

    2001 Hummer H1 6.5L Turbo Diesel 8cyl

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    Dimmer Switch

    Dimmer Switch Operation:

    A switch that allows the driver to select either high- or low-beam operation of the headlights, and to switch between the two.

    How To Instructions:

    Test - Give it an in-depth diagnosis.
    Replace - Out with the old, in with the new.

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