Quick update: I called my stealership parts department this morning. Had them send me the invoice with part # and price. $809.98 for the whole mirror. Online gm parts stores are $480ish.
I called the guy to let him know. No answer. 15 minutes later he called back and we chatted. Told him the cost of the mirror and he couldn't believe it. So, I sent him the invoice and part # and told him so long as it's oem and the same part number, I don't care where you get it! He said great and asked if he could get this figured out the first of the year after Christmas. I said absolutely and Merry Christmas brother.
he ponies up!