I submitted the form directly to GM on February 11th 2020. I had both taillights repaired at different times by Dave Ruberg in Winona, MN. I claimed the repair cost, shipping and packaging costs and provided receipts. Total was $367. Did not hear anything so started raising hell with Customer Assistance in Philipines, letters to GM facebook etc. No reply other than an occasional we are checking. May 13, 2020 out of the blue a guy calls and says he wants to apologize because "this is not the way we do things at GM". I received a check from GM a few days later for the full amount I claimed.
If you google "N182180270 Tail Lamps Inoperative" you will have the special policy. I have attached the form you use to this post. You have to submit the request before 12/2020.