HVAC issue: no heat unless set at 90 degrees 07-14 Tahoe

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Doubeleive

Wes
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I suppose new oem parts can be faulty, and I do have the old one. Based on what others have said here and else where, I'll try a tech 2 first before I pull the dash out again.
I haven't changed that one before from what I understand it can be done without pulling the dash, although it may not be exactly easy.
 
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jared999

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How long have you had the truck and was the headliner ever replaced? I've never seen without at least one but admittedly doubt I've seen them all!
using your photo, I ran my hand along the headliner and low and behold, the headliner was redone because that vent is covered. I can feel the circular vent underneath the headliner.
 

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