One problem related to automatic transmission park/neutral start interlock switch has been reported for the 2018 Chevrolet Traverse. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Chevrolet Traverse based on all problems reported for the 2018 Traverse.
Shifter doesn't recognize its in park once car is in park and turned off (some cars cannot turn off ) cars cannot be locked. The car continues to ding. The shift assembly has to be replaced. Looking at the internet this has been going on for years. My vehicle is a 2018 premier Traverse with 50,000 miles.