I have a 2007 trailblazer 4WD that I want to tow 4 wheels down behind my motorhome. Owners manual shows an automatic transfer case knob with a neutral position and indicator light. MINE DOES NOT HAVE A NEUTRAL POSITION OR LIGHT ON THE KNOB. I called Chevy, spoke with 2 different people and got 2 different answers. #1 put transmission in neutral and transfer case in auto. #2 put transmission in neutral and the transfer case in 2 wheel high. Both seem wrong to me and dealer can't help. Does anyone have any knowledge of this? Customer service says car was updated but owners manual was not???