Catylatic converter heat sheild.

[THE "10" SILVERADO]

Under the truck last night trying to pull my stock cat crossmember, and I noticed that there is a cat converter heat shield that bolted to the middle and I think was held in place between the frame and the cab, but I could be wrong on that. Is there an easy way to remove it? I know it was bolted to the CM but I couldn't figure out how it was mounted to the cab orframe. I'd like to remove it to clean up under there since I don't have a cat but I gotta figure out how to get it off though