In our 2002 LTZ I am having problems with the TB jumping to AWD, 4WD, or trying to jump into 4LO on its own when the switch is in 2WD. This happens a lot at hiway speeds but has also happened just parked and at idle. Anyone else have this issue? I have heard several potential causes for this but it has been suggested to me to replace the switch itself. Any suggestions would be appreciated.