Duh. I feel so stupid. It was the TCM battery fuse missing. I'm not sure where I put that one....into an unused spot that now has a fuse lol. What an idiot. That's why I don't just start pulling fuses, at least not until this morning. I'll reconnect the battery in the morning since it's dark now and this battery is hard to get to. Thanks man.Bruh... Sounds like your trans is in limp mode. Double check those fuses, particularly the TCM fuse(s) to see if any popped while you were reinserting them. Sometimes an old fuse can be fragile and break when pulling and/or pushing on it. You may wanna check them with a DVOM cuz sometimes they can look fine.
I think when my tax return comes in, I'll get a few more things like that. I just found out my Blackbear tune went up to $325 from $300 to add a VIN to my Autocal. But it will be a piece of cake to do. It will be nice to not only firm up the shifting and add a few HP but calibrate the speedo for the 26's and turn off the TPMS since there's no sensors in the intros.![IMG_7605[1].JPG IMG_7605[1].JPG](https://www.tahoeyukonforum.com/data/attachments/187/187941-971438aca5891aecca36b1afe839ae21.jpg)