no rear air on 2002 denali

[WDE]

When I got back into my Denali I turn the ac on in the front and it works fine just the rear when I turn my over head control knob on nothing no air or anything but was working ten minutes ago but no air at all now. Are there any fuse or relays? What could be wrong?

 

[JochenWoern]

When I got back into my Denali I turn the ac on in the front and it works fine just the rear when I turn my over head control knob on nothing no air or anything but was working ten minutes ago but no air at all now. Are there any fuse or relays? What could be wrong?

Is NOTHING working back there at all, meaning no air flow? Or do you just not get any COLD air flow?

Have you tried it from the rear passenger controls to see if it works when controlled from there?

 

[WDE]

Are you talking about the controls by the sunroof for the rear cause those are the only ones I know of. What others are there?

---------- Post added at 04:32 PM ---------- Previous post was at 04:17 PM ----------

No air at all

 

[JochenWoern]

Are you talking about the controls by the sunroof for the rear cause those are the only ones I know of. What others are there?

---------- Post added at 04:32 PM ---------- Previous post was at 04:17 PM ----------

No air at all

You should have some controls for the rear passengers as well, behind your center console.

 

[WDE]

Mines an 02 and I only have the controls above my head for the rear is there a fuse for it?

 

[JochenWoern]

Mines an 02 and I only have the controls above my head for the rear is there a fuse for it?

Sorry. Thought the Denali would have the controls also in the rear.

I would imagine there to be a fuse, check you manual.

 

[zieglerj-pdm-specialist]

Year controls

Sorry. Thought the Denali would have the controls also in the rear.

I would imagine there to be a fuse, check you manual.

I thought there would be rear controls on the back of the middle console of the front seats. If you have it in manual you can adjust the air heat and everything from behind. Are you 100% sure there is not controls.

 

[Vette66]

Pretty sure all 01-02 where like this when looked at different trucks. 03's and up varied.

 

[WDE]

Exactly what mine looks like what could it be?

 

[zieglerj-pdm-specialist]

OK

Pretty sure all 01-02 where like this when looked at different trucks. 03's and up varied. View attachment 23176 View attachment 23177

The Front AC works correct so were looking at a Vacuum Problem or a solenoid is not opening up to allow air to Flow to the rear. Does heat flow back there? Or is it both air and heat has no flow. If its only the Air its a solenoid not actuating to let the cold air flow, if there is no heat or cool air the rear fan is not blowing and that is your culprit. So do you have heat back their but no air or do you don't have any airflow at all?