04 Tahoe z71

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Bigtrite

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Just sold my 02 rust free Denali XL and I found a pretty good deal on a rust free z71. The rear heat works but the rear AC does not. The front heat and AC work. Where should I start
 

Scottydoggs

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theres a blend door actuator behind the pass side rear plastic panel. they go bad. had to change mine. the plastic all comes off pretty easy and the actuator is in the wide open to replace. theres vids on yt.
 
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Bigtrite

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Is it an actuator that switches heat and AC? I didn’t realize it had an actuator for the rear. I was thinking it ran off the one in the front
 

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