PACCAR issued a recall on multiple vehicle models

On certain trucks, when the ignition key is in the 'ON' position, the pre-heater, located in the fuel filter base, is energized. If this pre-heater is energized while maintenance is being performed on the fuel filter, diesel fuel could ignite within the filter housing. A fire within the fuel filter housing may spread possibly resulting in property damage or personal injury. Correction: Dealers will inspect and, if required, replace the fuel heater assembly.