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heat problem HELP! [Expired Topic]

Discussion in 'Chevy Express Forum (GMC Savana)' started by express conversion, Jun 9, 2010.

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  1. express conversion

    express conversion New Member

    does anyone know what exactly controls the rear heat control valve. I know its controlled by vacume but dont know what makes the vacume =, weres it located nothing. lol
    can anyone help me please
    Last edited: Jun 17, 2010
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