One problem related to engine engine control module (ecu/ecm) software has been reported for the 2014 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 GMC Sierra 1500 based on all problems reported for the 2014 Sierra 1500.
The contact owns 2014 GMC Sierra 1500. The contact software modification done at a transmission shop, affected the active fuel management not allowing diagnostic. The manufacturer was not notified of the failure. The approximate failure mileage was 210,000.