TECHNICAL SERVICE BULLETIN: 3.8L GDI MISFIRE DTC JUDGMENT LOGIC IMPROVEMENT - This bulletin provides the procedure to improve the logic of the Engine Control Module (ECM) on some 2020MY Telluride (ON) vehicles with 3.8 GDI ULEV engines, produced from January 9, 2019 through May 19, 2020, which may exhibit a cold start misfire with MIL ON for the misfire related DTC(s) listed below.
