Need to restore accurate engine temperature readings and get your cooling system working the way it should? The Walker Engine Coolant Temperature (ECT) Sensor is a direct-fit replacement designed to bring back reliable coolant temperature data when the factory sensor starts to fail. On 6.5L GM diesel applications, a faulty ECT sensor can cause poor cold starts, incorrect fuel delivery, overheating concerns, and inconsistent gauge readings because the ECU relies on this signal to manage operation. This sensor restores that critical temperature input so your engine runs clean, consistent, and properly controlled again.

Built to OE fit, form, and function standards, the Walker ECT sensor uses durable thermistor-based internal components engineered to accurately track coolant temperature through constant heat cycling and long-term engine operation. The housing is designed to resist corrosion, moisture intrusion, and vibration in harsh cooling system environments where sensor failure is common over time. Each unit is tested to OE specifications to ensure precise signal output and stable ECU communication, delivering dependable temperature readings, proper engine management, and long-term reliability.