r/HPtuners

I am dealing with a 2017 Tahoe with the AFM issue, and I am trying to confirm the required stuff that I need to buy. The idea will be to help diagnose the issue on the front end, and tune that out the AFM after the repair. I also have another 2015 chevrolet truck that I may work with as well.

As far as I can tell, I need an interface cable. I have the laptop and can download whatever software is needed. Is that all I need?

Is there any reason to go with the MPVI4 over the MPVI3? I assume the 4 will do everything the 3 will and the advantage would be newer vehicle compatibility. The 3 seems like it is all I need if I could save a little money on start up costs.