Thanks BSTatics. If I have to i'll bite the bullet and take it to a shop. Heck they gotta eat to right?

HOWEVER... had to drive the Burban today for about 15 minutes. It started cycling on for 10-30 seconds, cool air, then off for anywhere for 20-90 seconds. Could this be a pressure issue?

I have a 2011 Chevy Suburban, 5.3 engine, with rear air, 140k on the clock. Compressor will not engage. I can pull the relay at the box and jump it. Blows cold. Changed out relay with another from the fuse box (same part number, it's for the driving lamps), still wont engage. When engaged/jumped the...