My 2020 Sierra started leaking quite a bit of oil, crawled under it and the filter was loose. Probably lost a ~1 - 1.5 liters of oil. Last oil change at the GM dealership was 3 months ago. Figure they didn't tighten the filter enough, and over time it loosened. Once the dealer finally called/emailed back (~ 5 days) their response was pretty much shit happens, maybe the filter is defective, but it was 3 months ago so oh well. Am I crazy for being mad? I kind of figured a free or heavily discounted oil change was fair...or am I being unrealistic?