Question about 2002 Chevrolet Silverado 1500
Your heater box has what is called a blend door in it, this directs the flow of air to its destination selected on the control. Sometimes something can block the door by falling in the vent or the door also has what is called a blend door motor that opens and closes the door. Some of these motors are power and some are vacum. The problem with vacum is the hose sometimes come off. Maybe this will give you a place to start looking. Good Luck, Roger
Posted on Feb 08, 2010
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Posted on Jan 02, 2017
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