Just had my first one done today at 2500 km ( I know GM recommends the first one at something crazy like 10 000 km) but to each their own. My question is The owners manual calls for a PF64 oil filter Part # 12696048 and they installed a PF64F Part # 19386865. Anyone know the difference beside the" well one has an F at the end" Jack Raccoon answer.By the way for everyone that thinks you need to pay if you get it changed early the answer is NO you don't it was covered.