2009 suburban 1500 4x4 LC9 motor swap 2011 LC9 VVT with harness and ECM

[Mike dailey]

I have a 2009 suburban 1500 4x4 with LC9 motor and 6L80 trans. I was told by a local repair shop the 2011 LC9 VVT (trans was also 6L80) they had was capatable and purchased it with the harness and ECM. I finally got time to work on it. The harness is not plug and play, transmission and transfer case plugs are not the same or same number of connectors, nor for fuse box. Any way to make this work or am I hosed? 

[Jsdirt]

Ahh, the joys of working on modern vehicles.

 

In this day and age you pretty much got to stick with what the truck came with as far as replacement parts go. 2011 is Global-A architecture - a completely different animal. If you mix and match modules on a global A vehicle, the ECU bricks itself nine times out of 10. GM calls this an “antitheft” feature. In reality, it is a major headache for seasoned techs and DIY’ers alike.

 

So in other words, NOT compatible. I would try to get your money back on that one, or cut your losses and sell whatever you have that you’re stuck with.

 

however, there are people who do this type of crap day in and day out so maybe there’s a workaround? If there is, I certainly want no part of it! This is why my newest vehicle is now a 1994 model. Everything is stress-free and cheap for me again.
 

Good luck.