Recent content by cgriff401

  1. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Here we go: So I originally set out to find out if I could replicate what I had seen some others do online on older generation trucks (GMT900 specifically) by swapping the two-speed NQH (MP3023) transfer case into a truck that originally came with the NP0 (MP3010) single-speed. I have a 2018...
  2. cgriff401

    Everything is so cooked I don’t know what to replace first.

    Ok thank you for the advice. I’ll take it somewhere for them to assess and go from there.
  3. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Will update this post later with extra details, but the swap worked successfully! No reprogramming either! I want to do a write up to help others seeking something similar but I need time to do that which I lack now.
  4. cgriff401

    Everything is so cooked I don’t know what to replace first.

    My bad, I actually had an edit typed up with all the info and apparently forgot to click send... 2018 Yukon XL SLT, all options standard on suspension (no air/magneride). Has a 2in level and very slightly larger than stock tires (265/65/18 to 265/70/18). 150k miles, highway for the vast...
  5. cgriff401

    Everything is so cooked I don’t know what to replace first.

    Long story short, lots of bushings in the front end appear heavily worn. The entire steering rack appears to move side to side +- 0.5in from center when the wheel is turned with the vehicle stationary. Additionally, the LCA bushings also have significant play (of probably a quarter inch) in the...
  6. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Got a question for anyone who might have the knowledge: will a tcase from an 8L90 work on a 6L80? Same spline count, same internals, same electronics, but the spline depth is slightly different; I found a youtube video saying this should work but I'd like to try and find another opinion.
  7. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Update: current roadblock is that I am having a really hard time selling this tcase. Need to get the extra tcase I have sold before I buy another NQH tcase to finish the project. Havn't gotten any interested buyers on Marketplace or Craigslist. Just trying to get ~$250 for it at this point; just...
  8. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Unfortunately no. Only had the manufacturer broadcast tag on it when I got it (with a bunch of numbers that didn’t return anything meaningful when searched on ACDelco’s website or just on google). I verified last night it is a single-speed. Guess I’m still in the market for a two-speed tc...
  9. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    No, I replaced the TCCM from a truck with the same specs and same generation just with the NQH option to see if I could avoid programming and I do not have any errors. The dash properly indicates 4Lo as if it is in gear along with the message to place the truck in neutral; all behaves as it...
  10. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Unfortunately a relearn didn’t fix anything. Still will show 4Lo on the dash as well as through the scan tool. Leads me to think I got scammed by the guy showing me an RPO sheet from the truck it supposedly came out of when it didn’t actually come from that truck.
  11. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Also I don't know if its relevant but I hear a lot of very high pitched noises (although very quiet) that sound like they are coming from the TCCM that weren't there with the old TCCM. Again, no error codes, just doesn't actually go into 4Lo despite the dash saying it does.
  12. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Update to my situation: I obtained a transfer case and TCCM with the new dial to put into my truck (the TCCM was already programmed for an MP3023, just not specific to my VIN). I completed the swap and the truck drove completely normally in 2Hi, Auto, and 4Hi. Oddly enough, it would (without...
  13. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    I know it is/was possible on the GMT900s so I'm banking on it also working on the next gen K2XX trucks but I am rolling the dice a bit...
  14. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    Great advice, thank you! I have a book with the wiring schematics I need. I can snag a J2534 cable off amazon for $170 and run SPS2 through it for another $45 (although I've never done that before) if needed for programming. on top of the $300 for the hardware that puts me over $500 so I think...
  15. cgriff401

    Transfer Case Swap - MP3010 to MP3023

    I happened to find a donor truck with everything I need (switch, TCCM, and MP3023 transfer case). They want $300 which I think is reasonable. Waiting to pull the trigger til later this week though.
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