Review on ACDelco 26064030 Original Equipment Differential by Philip Berry

The item arrived in an envelope with no packaging, part number or any type of identification. The part may be correct, but I don't want to take the diff apart to find out if the part is correct. It's insane that a "Genuine GM Part" arrives without identification, packaging, a label, or a stamped part number. Part reordered from amazon.com and replacement arrived in manufacturer's sealed packaging.