Rear Air

[renrut.j.k]

I searched for information first but couldn't find anything so hopefully some of you folks can help me out.

On my 1999 Tahoe my rear air seems to be bipolar, sometimes it blows nice cool air and sometimes it blows steaming hot air. Is there a control valve somewhere that controls the rear air and if so is it vacuum, coolant or electric controlled?

Any help would be greatly appreciated.

 

[rushtk]

I want to put rear air in mine, let me know if you hear of someone adding and good luck with yours.

 

[mikk999]

realfixesrealfast on youyube. He explains issues with rear ac