Okay so as of now I need to remove 2 washers that are stuck in my heads. They aren't budging. (4 and 7 both horrible spots to see in) I talked to a sharp duramax guy about it, he thought I must of used LLY washers. Appearently the llys are alittle bigger and will get stuck down in an lbz head. Now heres where I'm confused.... You can buy a lly injector seal kit and an lbz injector seal kit, 2 different parts. But in the engine rebuild kit from mahle clevite for llys and lbzs they are the same kit. They come with everything but the head gaskets to reseal your vgt gmt800. Soooo, yeah what the hell I guess they give lly washers only.