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GMC Forum: Rear AC Eliminate 2011 Denali
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Old 05-04-2018, 04:35 PM
Uncleswede Uncleswede is offline
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Drives a GMC Truck
Join Date: May 2018
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Default Rear AC Eliminate 2011 Denali

I am eliminating the rear a/c on 2011 Denali. The installation went fine bit now the a/c compressor wont stay on so it wont take refrigerant. The auto climate control unit that we have doesn't have pressure on the dryer. There must be a low pressure cut off down stream?

Has anyone encountered this before?

My son in law bought this vehicle in the winter and it wasn't until the first hot spell here in Minnesota when we realized the a/c didn't work. We tried patching the pin hole leak in the high side line leak in the rear wheel with JB Weld. I was able to draw and hold vacuum to evacuate the system but every time I jumped the compressor relay to add R134 it just leaked out the hole. I assumed the compressor was working because the clutch engaged after jumping the relay. After I installed the elimination kit it would take no refrigerant at all? I used my manifold gauges and found 100 psi on the high and low side with the compressor running. I think what was happening was that the refrigerant was leaking out the hole when I was putting it in giving the false impression that the system was taking it but when I blocked off the rear lines the system was sealed so that's why it would not take refrigerant.

It looks like this vehicle had two AC problems the infamous leak in rear wheel where the line bends so you cant install a compression fitting and a bad compressor as well which is probably why the previous owner traded it in.

The procedure for the elimination of the rear ac on a 2011 Denali with auto controls.

Any help would be greatly appreciated.

Last edited by Uncleswede; 05-05-2018 at 08:56 AM. Reason: Update
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