Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
I have a 2007 LBZ with around 230k on it. I replaced all 8 injectors, at the same time, with Bosch remains around March of 2021. Since then, I have replaced the injector oring on injector #5 about 5 times. I replaced the copper thing on the bottom of the injector, the holder, and bolt. Why is it...