Question about 2000 Chevrolet Silverado 1500

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2000 Chevrolet Silverado Warm Heat

When i start my truck i have heat, but as i drive down the road itturns into just warm air. The passenger side of the truck will blowcold air out on the floor when the drivers side just blows out warmair! I have thought it could be the thermostat but if that was the casewouldnt it blow cold air with no warm air?

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  • Gary Queen
    Gary Queen May 11, 2010

    You have a coolant leak somewhere,

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You are experiencing a warm air blend door problem, possibility cased by a week vacumn diaphram.
This can be a defective blend air door or a vacumn problem.
Bill

Posted on Nov 19, 2008

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