Good evening folks. Back home from brothers place out east. This P1 filter I'm going to guess was off my brothers Saab suv(same size as a trailblazer with the 5.3 v-8 engine. Oil was Carquest synthetic 5w30 also. He put another P1 as he said he has a few of these older ones left with more Carquest synthetic 5w30. Enjoy the pics