[f5fstop]

I agree, see if there is a code by calling Onstar, but write it down. Some codes will cleaer automatically after 40 or 80 engine run operations, if the condition does not come back. (Engine run operation is from a startup below a programmed engine temperature, to a warm up cycle above a certain programmed temperature. Some vehicles erase after 40 cycles, some after 80...not sure on the H3.)

If the code is B0790/2725, C0306/0327/0329/0359/0550, then it could be the transfer case control module as Partsguy states.