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Great air flow on cold setting/no air flow on high heat
I have a 2005 GMC Savana with the manual HVAC system. I replaced the control head and 2 vacuum actuators and the electronic temp door actuator. When the potentiometer is on the cold- mild setting I have great air flow thru the vents and then when I turn it to ... Login to read more. 
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| Engine | 4.3 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2005 GMC Savana 2500 4.3L
| Engine | 4.3 L |
| Trans | 4-speed Automatic (Electronic) |
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