Keep your engine running smoothly with the GM Genuine Parts Engine Coolant Temperature Sensor. Designed to precisely measure engine coolant temperature, this sensor is an essential component for maintaining your vehicle's performance and efficiency. The sensor, with part number 55591401, is a genuine replacement part that meets the high-quality standards of GM Genuine Parts. Ensuring accurate readings, the engine coolant temperature sensor helps the engine management system regulate coolant temperature, preventing potential issues that could lead to overheating or other serious engine problems. With a direct fit and easy installation, this sensor is a reliable choice for your vehicle's maintenance needs.