Chevrolet Silverado 3500 HD poor fuel mileage at 14 mpg not resolved on Chevrolet Silverado 3500 HD

Some Chevrolet Silverado 3500 HD owners report experiencing poor fuel mileage, averaging around 14 mpg, due to several contributing factors. These issues may include underinflated tires, which can increase rolling resistance and force the engine to work harder, thus consuming more fuel. Additionally, engine misfiring caused by faulty coil packs, spark plugs, or fuel injectors can significantly reduce fuel efficiency. Some owners also note problems with fuel flow or nozzles related to the EVAP system, which may affect fueling efficiency. Furthermore, neglecting routine maintenance tasks, such as checking air filters and cleaning fuel injectors, can hinder performance and fuel economy. Lastly, aggressive driving habits, excessive idling, and carrying unnecessary weight can exacerbate poor fuel mileage. Addressing these concerns may help improve the fuel efficiency of the Chevrolet Silverado 3500 HD.