Question about 2000 GMC Jimmy

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I have a 97 SIERRA. HEAT WORKS FINE ON DRIVERS

I have a 97 SIERRA. HEAT WORKS FINE ON DRIVERS SIDE ONLY!!! NO AIR FLOW OUT OF PASSANGER DEFROST OR FLOOR
PLEASE HELP... WIFE IS FREEZING

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  • baby_weasle Feb 27, 2009

    Nope it is "dial type" controls... Dash vents all work, drivers defrost works, drivers floor is weak but still there, but nothing out of passanger defrost or floor

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If you have climate controls that are "slide type" knobs...likely that the cable that controls the diverter panel in the blower box is broken....

Posted on Feb 27, 2009

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prev.gif next.gif HEATING AND AIR CONDITIONING Refer to Section 1 for discharging and charging of the air conditioning system. The heating system provides heating, ventilation and defrosting for the windshield and side windows. The heater core is a heat exchanger supplied with coolant from the engine cooling system. Temperature is controlled by the temperature valve which moves an air door that directs air flow through the heater core for more heat or bypasses the heater core for less heat. Vacuum actuators control the mode doors which direct air flow to the outlet ducts. The mode selector on the control panel directs engine vacuum to the actuators. The position of the mode doors determines whether air flows from the floor, panel, defrost or panel and defrost ducts (bi-level mode).

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