I have seen conflicting opinions for the correct oil pickup tube O ring on the LS motor....I recently bought a conversion pan kit and the O ring is reddish in color and is pretty thick ( about .174") ...... I have read that Gm's updated O ring for this app. is a blue O ring #12557752 which is thinner (about .134").....not sure when this suggested update came in to play....makes sense that a fatter one would seal better but just checking in to see if anyone has heard anything on the situation..........thanks