Hi all,
Trying to figure out a problem with front HVAC before it gets too hot during the summer! My '07 Suburban has the auto climate control setup and when I set the fan to full blast there's only a modest amount of air coming from the upper vents. A/C itself works fine and the air gets cold...
For the 4 years I have owned this truck I have had HVAC airflow issues. Air coming out of all the vents at all times no matter what I did with the controls. I found out the valves/flaps in the upper stack on the heater box had all fell and all of the rubber on them disintegrated. So even putting...
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