Question about 1996 Chevrolet K1500

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Heater only blows on florr wont change to vents

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Most modern heat systems are controlled by vacuum there is a vacuum hose that comes in the psssenger compartment from the engine to the heater controls if this hose has a cut or is off or loose you could experience those types of symptoms . But if your system is contrilled by a cable and the cable is broken of has come off there is your problem.
Im guessing that you have either a vacuum hose off, or broken or....... the HEAD unit the heat control is bad
Please cntact me if you need any firther help and if you find this information helpful please ive me a fixya rating thank you, Randy
fixincars@yahoo.com

Posted on Aug 25, 2008

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