I would think if either someone is paying for this filter change when they purchase a vehicle (included in the price) or it has become an issue that GM only released after a year or so of production, it should be in black and white, on the window sticker, in the manual, on the GM letter and that GM dealership’s should be letting buyers know when they take delivery, I purchased a brand new 2021 C8 and at that time I think GM didn’t know the C8 had this issue with the transmission, you only got one free oil change and no transmission filter change with the 2020 and 2021 C8s and you had to pay for the filter change yourself, I think GM then started including the cost of the filter change in the price of the C8 for year 2022.
It’s not a matter of knowing the services needed, it’s the fact that if your not told about the free filter change and how long you have to use it, you are more than likely going to get charged for it.
Yes I paid over $100k for me C8 (again) and this doesn’t mean because I can afford it, I’m not going to want my free filter change, I see right on the window sticker in black and white, it says I get 2 free oil changes and I will use them and so will near everybody else, however it’s not in black and white about the filter change and if you don’t know, you don’t get.