Here is a very interesting Wikipedia page for the Hybrid Tahoe(Etc.) that I stumbled across, It's not easy to find because they don't reference it as Chevrolet, GM, Tahoe, Etc., it is referenced by the formal name for the Hybrid Program, the "Global Hybrid Cooperation". I only found it because I was searching for technical info on the Hybrid Transmission, the "2ML70" transmission. What is most amazing is apparently they put the same transmission in big public transportation buses. If this is indeed the case, the transmission should be good for like 500K+ miles.

https://en.wikipedia.org/wiki/Global_Hybrid_Cooperation

 

Even the engine.