High pressure pipes are supposed to be replaced but its not a huge deal if you dont. Ive only seen 1 fail that was reused, but at the same time its off and you may as well replace it. I typically replace after theyve been used 4-5 times. 1-3-5 are all pretty simple to get to once the heat shields are off the EGR and the injector heat shield is removed. The return line seals really dont need to be replaced either unless theyre damaged but im sure they only cost a few dollars as well. Labor seems high to me as all the injectors can be pulled in about 20 mins (for me) as long as none of them are stuck. But my working conditions are different than most.Depending on which injector it is that labor price can be accurate. I question the parts total cause there’s more than just an injector that needs replacing like the high pressure pipes on these engines are one time use. And the fuel injector return pipe seals should be replaced as well. Injectors 1,3, and 5 are behind the egr and riser pipe. And I’d question the injector of course. I’ve only had one legitimate injector failure. 98% of the time it’s the connector to the injector. Not questioning this other person’s diagnosis as I have no idea what is wrong with truck, just my experience. And yes, injector flow rate does have to programmed in to ecm. Then there are an additional 2 steps I believe for proper setup according to service information in GM’s manuals.
that sounds like the LB7 rate and not L5PI was told by a Service Advisor the book time for 1 injector on one bank is 8.5 hours. I just had #6 and #7 changed, the tech took over 20 hrs I think.. Ended up not being the solution to the problem, now waiting for a ECM.
LB7 is 10-12hrs book for both sides if I recall correctly.that sounds like the LB7 rate and not L5P