Got back from the dealer after having my fuel pressure regulator replaced (yeah, no mo lope) and the Service Manager told me that one of my injectors was starting to have a higher Balance rate. He could not remember the particulars but that it was ok for now, said if I had any symptoms bring it in so they could recheck it. He also mentioned that he had heard that GM was maybe going back to replacing only bad injectors instead of all 8. Maybe I misunderstood him as I found this reply from Dmaxalli to another's post.... Are they doing all 8 only when you have a High Fuel Return Flow, fuel in oil etc. and maybe just the bad ones if only a balance rate issue... Does the fuel get in the oil by draining past the piston or by overpressureizing the return system?......thanks guys


Dmaxalli wrote in a previous post...


So, in all truthfullness, your truck does not qualify for replacement of all 8 injectors. It does, however, need attention to the cyl(s) that have the out of range balance rates. Out of range would be +/- 6.0 or higher.

high balance rate with no other symptoms only 'qualifies' you for individual replacement at 'most' dealershttp://www.dieselplace.com/forum/smileys/smiley2.gif

Injectors In The Lb7 Are Available In 4 Packs Good Luck Getting One. Now Lly's Are On Restriction Again Thanks To Sloppy Techs, And Are On A Need Basis, One By One And So Forth. Spend Some Time In Gm Messenger Guys And Talk To The Parts Guys Sometimes They Are Smarter Than They Appear. Thats If They Can Read The Infop Rovided To Them.

From my experience I had one insector at a +6.1 so we replaced it (6). After that another one rose above +6.0 so we replaced that one (2). Same story again so he replaced them all. It was like fixing one amplified the problem in the rest of them.