There should be a DOT number embossed on the lens. When you Google it, you should get a response with an aftermarket lens. It looks like they used two on each side, one upside down. If you find the GM part number, look a little deeper as you can usually find plug and play replacements that have built in LED's, versus an old bulb type.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor