Hello everyone

I'm increasingly interested in purchasing EFIlive equipment. One thing I do need is to be able to program new ECM/TCM modules and I know I'll need to subsribe to GM TIS2WEB and their SPS programming system. I see TIS mentioned frequently as I browse the forums here.

My question is, can EFILive hardware act as a passthrough, even though, as I understand, it isn't J2534 hardware? I'm looking to reprogram up to 09 L67 modules for LS4 vehicles, and E38s for north american 3500/3900 V6s.

Hope a knowledgeable person can help with the answer! Much thanks.