I may be in the wrong part of the site I'm new but I'll give this a go. My 06 LBZ has the EGR and has NOT been blocked and I'm looking at blocking it. I've read other places the when you block it you need to get a programmer to block codes from throwing. Then I read if your glove box Service Parts sheet has the FE9 in it you don't need a programmer? Is this true? Thanks!