2005 Z71 Tahoe hot air

[ScottyBoy]

My truck sat for almost a year while I waited on a new engine. After I FINALLY got a new crate engine installed, my AC was blowing HOT. Sure enough, I had no refrigerant. My Schrader valves had a small leak, and it sat long enough to leak out.
So check all the easy stuff first, make SURE that it still has refrigerant, then go from there.

 

[willinnashville]

Similar thing happened to me last week in my 2005 Denali. I disconnected the battery for a valve cover replacement. After I was finished I fired up and had hot air on the passenger side but cold air from the driver side. I did the recalibration steps basically the same as the video below and it's been fine ever since.

 

[willinnashville]