2015 Yukon XL Factory Air ride suspension diagnosis question

[Boatguy1x]

2015 GMC Yukon Xl SLT 4x4. Standard air leveling shocks(not magnaride) Compressor was running quite long after start up. Found a leak in the shocks, so I replaced both sides with AC Delco #19432783. Everything was fine for a couple of weeks. Then I noticed compressor running every morning at start up. Started checking and found shocks deflated every morning. I checked for leaks and couldn't find any.
When I finally got around to try and diagnose, they don't even inflate now and the compressor doesn't run.
After reading some forum discussion, I did a couple of things.
1) Jumped terminal 30 and 87 and the compressor did not run.
2) Saw a diagnosis YouTube video on the compressor that powered the red and black big wires directly from a 12v source. I did this and the compressor did not run.
I have a limited function scanner and it indicates a C0712-00 Code - Level Control Compressor Relay Circuit

I have a new relay inbound to try, but I am wondering if the code is leading me astray and it might be the compressor itself?
Any other steps to help isolate?

 

[wjburken]

My guess is you have a burnt up compressor. This can be caused by leaks in the system or a pressure relief valve that doesn’t close all the way.

Can’t speak specifically to the 2015 year, but have had to swap out more than a few on my generation of vehicles.

 

[Doubeleive]

2015 GMC Yukon Xl SLT 4x4. Standard air leveling shocks(not magnaride) Compressor was running quite long after start up. Found a leak in the shocks, so I replaced both sides with AC Delco #19432783. Everything was fine for a couple of weeks. Then I noticed compressor running every morning at start up. Started checking and found shocks deflated every morning. I checked for leaks and couldn't find any.
When I finally got around to try and diagnose, they don't even inflate now and the compressor doesn't run.
After reading some forum discussion, I did a couple of things.
1) Jumped terminal 30 and 87 and the compressor did not run.
2) Saw a diagnosis YouTube video on the compressor that powered the red and black big wires directly from a 12v source. I did this and the compressor did not run.
I have a limited function scanner and it indicates a C0712-00 Code - Level Control Compressor Relay Circuit

I have a new relay inbound to try, but I am wondering if the code is leading me astray and it might be the compressor itself?
Any other steps to help isolate?

could be, they fail just as much as the shocks do, I recommend the dorman pump, I had issue's with the arnott pump

 

[Tahoe14]

Try Rockauto if they sell the Dorman

 

[Boatguy1x]

My guess is you have a burnt up compressor. This can be caused by leaks in the system or a pressure relief valve that doesn’t close all the way.

Can’t speak specifically to the 2015 year, but have had to swap out more than a few on my generation of vehicles.

I was kind of wondering if maybe it was the valve that might be the culprit.

 

[Doubeleive]

I was kind of wondering if maybe it was the valve that might be the culprit.

if the relay gets the pump going again, you can spray it with a soap & water mix and check for bubbles, that was one the issue's I had with the arnott pump, relief valve was leaking