Rear A/C only blows hot air

[nGoldenm]

Hey everyone, first post here. I've just bought a new to me 2007 Tahoe LTZ. I've already gotten a lot of questions answered through this forum, so many thanks to everyone who's posted. Some things may seem trivial, but to new owners and people just searching the net, the information sometimes proves invaluable.

I've come across an issue that I can't seem to find any information on through searches (both internet and this forum, not enough letters in the words to produce decent results).

Just noticed tonight that my rear a/c will only blow HOT air, no matter what the temperature is set to. Cycling the controls through the hot and cold settings makes no difference. Having the a/c (snowflake) button turned on up front makes no difference.

I've run across a similar issue before in a previous vehicle which ended up being a blend door issue; however, I have no idea how the rear a/c is set up in these vehicles. What is the culprit most likely to be? Are there any other trouble shooting items I should try to diagnose the problem? What would it entail to fix this problem?

Any help would be most appreciated, as I'm sure that my rear passengers would appreciate the cold air when the heat of summer rolls back around here in the southeast. Thanks.

 

[nGoldenm]

Has anyone had or heard of this issue before? I'm really not sure where to start trying to diagnose it. Thanks.

 

[GM Customer Service]

Welcome to the forum! Did you purchase any type of warranty with the vehicle? I would recommend taking it to the dealer so that they can diagnose the issue and let you know what the best fix would be and then go from there. Keep us updated.
Breanne
Chevrolet Customer Service

 

[nGoldenm]

Welcome to the forum! Did you purchase any type of warranty with the vehicle? I would recommend taking it to the dealer so that they can diagnose the issue and let you know what the best fix would be and then go from there. Keep us updated.
Breanne
Chevrolet Customer Service

No, I did not purchase a warranty with the vehicle. I generally try to fix problems myself if possible as it's cheaper, and honestly, I find a type of enjoyment performing the work on my vehicles myself.

However, I may have to go to the dealer to at least get it diagnosed as I'm not really sure where to start. Unless someone on the forum has an idea for me? Thanks.