What are signs of a failing water pump in a truck?

A failing water pump in a truck is most commonly indicated by engine overheating and coolant leaks. The water pump is an essential component of the engine's cooling system, responsible for circulating coolant throughout the engine to dissipate heat. When the water pump fails, it can lead to insufficient coolant flow, causing the engine to overheat. Additionally, if the pump is leaking, coolant will escape from the system, further exacerbating the overheating issue and possibly leading to significant engine damage if not addressed promptly.

The other listed signs, such as increased tire pressure, reduced brake performance, and low fuel efficiency, do not directly relate to the functioning of the water pump or its failure. Increased tire pressure pertains to tire condition, reduced brake performance is related to the brake system, and low fuel efficiency is associated with fuel delivery and engine operation issues, rather than the cooling system. Therefore, recognizing engine overheating and coolant leaks as signs of a failing water pump is crucial for the maintenance and reliability of a truck's engine.