A strange black mark appears on a component, but could it really be the cause of an engine misfire? In this diagnostic breakdown, we investigate the unusual sign, trace the issue, and uncover what ...

A new service update from GM includes a very small number of the 2024 GMC Sierra 1500 pickup and the 2024 GMC Yukon SUV that may be affected by a defect in the naturally aspirated 5.3L V8 L84 gasoline ...

DAYTON, Ohio (WDTN) — If you’re experiencing engine misfiring or performance issues with your vehicle, it might not be your car’s fault. Poor gasoline quality can result in a blockage building up in ...

A check engine light that returns after being reset means the underlying fault has not been repaired, only cleared from the vehicle’s diagnostic memory. The OBD-II system monitors engine and emissions ...