2001 Yukon XL Transfer Case Issue

BigLurr54 · April 6, 2019

I have a 2001 Yukon XL 1500. The truck mostly just sits and only gets used to pull the boat of take a run to the dump. I went to move it the other day and tried to take it our of 4 hi. Nothing happened. I tried to pull out of the mud and only the rear wheels spun. Then I tried again and the buttons all flashed at me and the service 4wd light came on. I could put the buttons in awd and 4hi but nothing else.

I figured my transfer case position sensor was bad. I went to put a new actuator with a new position sensor. The transfer case was in 2wd. I hooked up the wiring and tried to shift the actuator into 4hi so I could install it. The lights went out on the switch. They have not returned. I manually shifted the t case. It was in 2wd and I changed it to neutral. Installed the actuator. And put it all together. Still no lights and no response from the button. I pulled the buttons and reflowed the solder. Still nothing.

I checked the ohms on the switch and they were all stable but in not sure what the right ohms for the truck are. I'll post them in a bit.

Any ideas on what to do next. Now I am stuck in neutral and no lights.

I also ground the bad grounding spot and put that together so that is ruled out.