Steering problems on 2009 Hummer H2

[ken.j]

Appreciate the replies, have checked and was not in 4W hi lock.
Symptom occurs when parking at low speed. Previously had no issues at all when parking or turning at slow speed as with my other two trucks even when parking, I could palm the steering wheel - have to wrench now on the H2.

Also as mentioned local GM Tech " feels " something not right with steering. I guess best to put back stockers and take into Hummer dealership to check out.