Jim,
I have a 2021 Yukon with air ride suspension. I think its identical. I think you need to set the suspension to normal height then enable air suspension "Service Mode" in the infotainment screen on your dash under Settings/Vehicle/Suspension. In service mode it will not change the suspension height and will disable the compressor. I suggest you read your owners manual because there is a procedure you need to follow in hitching a trailer and setting the suspension load height. Hope this helps.
Regards, Gary
I have a 2021 Yukon with air ride suspension. I think its identical. I think you need to set the suspension to normal height then enable air suspension "Service Mode" in the infotainment screen on your dash under Settings/Vehicle/Suspension. In service mode it will not change the suspension height and will disable the compressor. I suggest you read your owners manual because there is a procedure you need to follow in hitching a trailer and setting the suspension load height. Hope this helps.
Regards, Gary