One problem related to automatic transmission control module 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.
Vehicle had known service bulletin transmission shudder and told torque converter failure for vehicle with only 57000 miles. Vehicle already had tcm and transmission control and flush services at 9,000 and 15,000 miles. Gm did 50/50 split of bill since 5 year power warranty was expired. Gm should be paying these entire costs to customers for a known quality issue documented in numerous service bulletins for the Traverse.