ACDelco 55495858 Position Exhaust Gas Temperature Sensor - 4

The ACDelco 55495858 is a GM Original Equipment Position 4 Exhaust Temperature Sensor that reports exhaust gas temperature to the engine control module, serving as a direct OEM replacement component for General Motors vehicles. This critical emission system sensor plays a vital role in maintaining optimal engine performance and protecting exhaust after-treatment systems.

Key Features:

• Temperature signal used by control module to adjust fuel delivery and boost pressure
• Heat and vibration resistant for efficient operation
• Manufactured to provide the same performance, durability, and service life expected from General Motors
• Position 4 sensor location for precise exhaust monitoring
• Direct replacement for GM part number 55495858

This sensor helps protect exhaust after-treatment components from overheating and keeps them operating efficiently. Commonly used in 2.8L turbo diesel engines, this sensor is essential for proper EGR valve operation and emissions system function. As a genuine ACDelco GM Original Equipment part, it meets all factory specifications for fit, form, and function.