2006 Envoy - 4wd not working
My sister's 4wd does not work and we're not sure how long it hasn't worked.
We were at our lease and needed 4wd but it wouldn't engage. Got to looking at the 4wd disconnect and it was completely shot (seal was gone and was in pretty bad shape overall). Got that replaced along with the front diff actuator. I can hear an actuator engage as well.
We have also replaced the switch and replaced all fluids (inexpensive and cheap insurance) but it still does not work.
I found a step-by-step troubleshooting guide but haven't had a chance to try it out.
Any other common issues to look at? I haven't checked out the shift motor/actuator on the t-case yet though.