Thanks, I don't think I would have done it without the many other prime examples on this forum who have done so before me.
So, after the outdoor temps increased, these issues went away. Like completely went away. The truck drove awesome all summer... Once the outdoor temps started decreasing recently again, the issues came back, but only one engine code came up. I had continually been getting P0606 if the engine was cold, and the engine would run oddly rough, just as it did last winter. Once the engine bay warmed up, it would run amazing, and I could clear the engine code and it wouldn't come back until the ecm was cold again. So, I purchased a used ecm from a local forum user, swapped it out, did a field relearn, and it's been running great the last couple days.Wanted to copy/paste to my build thread about an issue I also posted here:
The new forum look has been confusing. I think I've got the hang of it now... So, sorry about the delayed reply.I may have missed it, but did you get the Quadrasteer working? I’m planning to start this swap on my 03 GMC 1500HD Q-steer in the near future. My donor is an 06 GMC 2500HD LBZ/Allison. I plan to use the 2500hd frame and swap my body and diffs. Thanks for doing this write up! Your pdf file is amazing! It has given me the info and confidence I needed to get started!