4L60E to 4L80E conversion in a GMT900

[BlueStreak78]

I have a question... The vehicle speed sensor connector I bought has a purple and green wire. How do I know which wires it connects to on the main harness round connector? Not all the connectors have the same wiring, but they fulfill the same functions. Please help ASAP

[BlueStreak78]

there.

Hey brother in this pic it does not show moving 45 to 26. Also, what wires on my connector purple/white or green/black go to the orange and light blue wires off of the main harness connector? Seeing as how my truck is a 2011, it does not have the electronic selector switch on the side as it is apparently inside the trans so how the heck am I suppose to wire this transmission up?

[TurboAvalanche6.2]

i did this swap, followed this tut. everything works, tranny shifts fine, speedo works no issues. however, tow haul isn't working. i'm using a t42 tcm out of a 08 van with the 80e... anyon else have this issue? btw this is an a 08 rcsb sierra

I know this is an old thread, but did you figure out the issue with tow haul? I'm having the same problem.