Q: does 2004 6.0 have EGR???

I don't think the 2004 have the EGR valve. I know that 2003 Avalanche that I worked on today didn't have EGR. They seem to be dropping it, even the 4.3 doesn't have it in 2004.

Ian

How are they keeping chamber temps down? Better cooling?

GMC Greml>

I have no idea. It's probably more to do with the fact that they are able to control emissions so much better now that they can drop items and still meet the requirement for this market. I'm sure markets like California still require EGR valves.

On the other hand, air pumps are back on a lot of the newer cars. They use electric air pumps now that just sit behind the fenders. They seem to fail quite frequently, but it's easy to diagnose...sounds like jet engine reving up when you first start the engine.

Ian

I can't remember, are you supposed to gain something by not having an EGR valve? By popular belief? Or would chevy drop it because it can save them some $$

GMC Greml>