O ring for oil pump pick up tube.
 

I got a new one for my 02 Silverado I noticed they are different colors.I really can't compare it to the old one because it looks like it has squished over the years.Is there much of a difference between years?IMG_20220731_151701607.jpg

Re: O ring for oil pump pick up tube.
 

There are two different O rings, different thicknesses depending on the style of pick up tube in place....

See this link for details....courtesy of LSX Mag...

https://www.lsxmag.com/news/identify...-your-ls-swap/

Hope this helps

:chevy::chevy::chevy:

Re: O ring for oil pump pick up tube.
 

Thanks for the response.Im not for sure why the Chevrolet dealership sold me an orange o ring.They said that was the only one listed for my truck.Looks like will be returning it and try to locate the proper oring I really don't want to do this job twice.

Re: O ring for oil pump pick up tube.
 

This is the oring I used in my 2002 suburban with5.3 after I lost oil pressure at cold start, worked fine

Re: O ring for oil pump pick up tube.
 

Look at the end of your pickup tube...if it looks like the pic in the linked article the correct O ring is GM 12557752

if your pickup tube has a depression to accept the O ring the part number is the one the dealership sold you...it fits what they term the second design tube....

The later tube O ring is thicker in section....