This page will have random information, pictures, schematics I used to do the Duramax swap on my 1967 C10. The donor vehicle was a 2008 Express ambulance. The 6.6L Duramax was mated to a 4L85E. This was a lot more complicated than a gas swap. This page is not meant to walk you through the process, but will just show you what I did, and the support material I used to complete the conversion.
2007 LMM ECM Pinouts - I used for removing unwanted circuits. I removed DPF, EGR, Intake Air Valve, so on.