97__Z71
OBS Enthusiast
Every time I start my truck in the morning it sounds like it knocks, but then it goes away after a couple of minutes. Oil pressure is 60-80 cold idle 30-40 hot idle. From what I've herd this is a common issue with these trucks and that people call it a "Piston Slap" and that it isn't bad. I'm just curious to know what exactly is going on.