Different design than the LB7s internal injectors. There much longer and thinner than the LB7 injects.
What makes them better? Don't know. Maybe that there not bathed in hot oil constantly? Maybe internal materials are a little more durable? Maybe both? :dontknow: No one seems to know for sure. Maybe Bosch? The LBZ injects still fail on occasion, but not anything like the LB7s do from what I've researched.
Something somebody knows but it's a tight secret because no owner of these trucks know. All we can do is look at what GM changed starting with the LLY.
1)Relocation (out from under the valve cover oil bath)
2)Voltage
3) ????
I can't see the relocation that big of a deal . IMO it's more of a maintenance repair cost. Take away the hot oil how much different can operating temperature be?
Voltage thats more interesting but it wasn't a solenoid per say failure but the injector body (ball seat)
So I think (3) is just a complete over haul in injector design. Who has if anybody has looked at the injectors and seen anything different in design,material etc etc etc. I don't recall anyone saying anything about that ,side by side comparison or I missed it. Or it's just completely different?
I know it's been discussed to death but one thing for certain that drives me nuts is there is no definitive failure occurrence. Some fail some don't ,some eat injectors others get 2-3 times the life!!
