Q: My ac and heater controls don't work right. The driver side blows hot air and on 2003 Chevrolet Silverado 1500

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Passenger blows cold. My rear defrost won't work and the hot and cold controls don't work. The speed of the fan is the only thing that does work
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Alright. I will check it and and see if that's the problem. I really do sure hope so. Thanks for letting me no