AWD Problem on 2004 Buick Rainier

SUV is stuck in AWD and will not return to 2WD. What is the problem and how do I fix this?

Asked by for the 2004 Buick Rainier
Sounds like the transfer case is not responding to your input. Really need to have a shop look at this, because it could be a mechanical or electrical issue or both.
1 more answer
our rainier did that.......we had to have the differential replaced........thank god we bought the exdended warrenty