Help, I have a hole in my rear AC line, need to know where to go

You can find shops here www.repairpal.com/directory Get a couple of estimates so you can compare costs.

Please use the RepairPal shop directory to find a repair shop near you. You may be able to find a shop that can repair your damaged AC line instead of replacing it. Here is a directory link - https://repairpal.com/gmc-repair-in-milwaukee-wisconsin