Walker Engine Coolant Temperature Sensor 11-16 GM 6.6L Duramax LML ALI-AP63669 5″ systems

5″ systems

The critical pivot points are maintenance-free and extremely durable for long-lasting use

Older injectors would put out 1

so whether you're daily driving a tuned-up truck or hammering down the strip

Walker Engine Coolant Temperature Sensor 11-16 GM 6.6L Duramax LML ALI-AP63669 5″ systemsIs your truck experiencing hard starts, poor fuel economy, or erratic temperature readings? The Walker Engine Coolant Temperature (ECT) Sensor is designed to restore accurate coolant temperature data, enabling your engine to run efficiently and reliably. This sensor plays a critical role in how your ECM adjusts fuel delivery, timing, and overall engine performance. When it fails, you can see everything from rough idle to overheating concerns.