at dealership and tow driver said he delivered another trailblazer same year to the same dealership same day and that one would not go forward and they have not even checked out mine after 2
days and though I am entitled to a loaner they said none available at this time
Thanks for the update and please post what the dealership finds in case someone else has a similar problem. My guess is a faulty shifter or software related problem. Hopefully it's not the transmission.