If you are talking about your 06 then there is an O ring that you reuse on the fuel line going into the filter/regulator coming from the pump. I think this is what Blownchevy is talking about. The other O ring is where the regulator pushes down into the bucket.

 

You guys realize this thread is almost a year and a half old right?

 

I get a kick out of reading my old posts. I am always afraid people will take what I say as some ASE mechanic's version "My opinion" LMAO But we all know now that I have been around, I am a nobody.

 

Yeah someone dug up one of my first posts a long time ago when I was asking about how realistic it was to swap in a 6.0L It was entertaining to read. I wanted to go back and warn myself to leave it alone.

 

That's what I am talking about, go back 4 yrs and myself