Need to fix a faulty coolant temp reading without replacing the entire harness? The Walker Engine Coolant Temperature Sensor Pigtail is a direct-fit repair solution designed to restore proper ECT sensor signal when your factory connector or wiring becomes damaged. On 6.6L Duramax engines, worn or corroded connectors are a common cause of erratic temperature readings, check engine lights, poor cold starts, and incorrect fuel delivery. This pigtail lets you repair the problem at the source, restoring a clean, consistent signal so your ECU can properly manage timing, fueling, and cooling system operation.

Built to OE fit, form, and function standards, the Walker pigtail is manufactured with high-quality wiring and terminals designed to withstand heat, vibration, and long-term exposure to engine bay conditions. The connector is engineered for a secure, factory-style fit to ensure proper electrical contact and eliminate intermittent signal loss caused by loose or degraded terminals. Designed for durability in harsh environments, this pigtail provides a reliable, long-term wiring repair solution and is tested to ensure consistent performance and dependable communication with the ECU.