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is EFI live an option from the factory?

740 views 2 replies 3 participants last post by  Hick34 
#1 ·
I thought that EFI live was an add on feature that hot rodders are adding.

Today I got a VIN report on my new to me 06 LBZ and there on the list is

05 2500HD LLY- Efi live-mouthpiece-4in Dynomax -Cold air-H2s with 315s-Leveled

Maybe this just means that there is a connector there (mouthpiece?) for hooking up the EFI live tuner?

Or I should just say, what does that mean? its confusing because it says LLY when I've got an LBZ. :cookoo[1]:

or maybe that was just the TAG line from the nice person that looked up the VIN data for me.

don
 
#3 ·
does your truck have a DPF on it and is it on 315 tires and leveled? the mouthpiece goes right before the turbo. its a popular mod on older trucks for more flow into the turbo. EFI live gets flashed to the ECM and the switch gets wired to the ECM harness
 
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