dropped the oil pan to validate if this is a 5.3 or a 4.8 since the PCM VIN suggests a 4.8 but it was listed on Craigslist as a 5.3
oh yeah... that's Dusty in the background, Rusty's daddy!
well according to
Cliff's How To Channel on YouTube
4.8 or 5.3 LS Vortec? How to Know For Sure! my crank number is not 12552216 so it is not the 5.3
Side note, the oil pan is nice and cast aluminum, awesome work GM!