P0300 Code Chevy Silverado 5.3 02 Apr 2024 by Prof. Misael Ernser III P0300 misfire 3l ecotec3 2015 - 2019 5.3L Ecotec3 Misfire Code P0300 (GM Truck Gen 5 V8 Check Details 2015 - 2019 5.3L Ecotec3 Misfire Code P0300 (GM Truck Gen 5 V8