Four Seasons 36403 Engine Coolant Temperature Sensor

Four Seasons 36403 Coolant Temp Sensor

Four Seasons 36403 is an engine coolant temperature sensor built for direct replacement in a wide range of GM, Buick, Cadillac, Pontiac, Isuzu, Honda, and Jeep applications. This brass coolant temp sensor uses a female oval connector, 2 terminals, and a 3/8" pipe thread for a straightforward OE-style service part.

The Four Seasons Coolant Temp Sensor line is focused on accurate coolant temperature signal input for engine management and gauge operation. Part number 36403 meets or exceeds OEM requirements and is a practical replacement when the original sensor is worn, corroded, or sending inconsistent readings.

Key Features

• Brand: Four Seasons Coolant Temp Sensor
• Part number: 36403
• Brass construction for durable coolant-system service
• Female oval connector with 2 terminals
• 3/8" pipe thread fitting, male thread
• Meets or exceeds OEM specifications
• Direct-fit style coolant temperature sensor for many GM and related vehicles

Detailed Description

Four Seasons 36403 is an engine coolant temperature sensor designed to report coolant temperature to the vehicle’s control system. Accurate temperature input is important for fuel delivery, idle quality, cooling fan strategy, and dash gauge operation. This sensor is commonly used across Chevrolet Express, Silverado, GMC Savana, Sierra, Buick LeSabre, Cadillac DeVille, Pontiac Grand Prix, and other listed applications.

Compatible vehicle examples include 1999-2013 Chevrolet Silverado 1500, 2003-2014 Chevrolet Express 1500, and 2006-2011 Buick Lucerne. It also cross-references Four Seasons 33991 for the same application.

Common Issues This Part Can Address

• Incorrect coolant temperature readings on the gauge or scan data
• Hard starting or rough idle related to inaccurate temperature input
• Cooling fan operation that does not follow engine temperature correctly
• Check engine light concerns tied to coolant temperature sensor faults
• Corrosion, leakage, or connector damage at the original sensor

Installation Notes and Tips

Verify the connector style, terminal count, and 3/8" pipe thread before installation. Drain coolant to a safe level if the sensor location requires it, then inspect the connector for corrosion or heat damage before reconnecting. Use the vehicle’s service procedure and torque specification for the exact application.

Fitment examples include Fits 1999-2013 Chevrolet Silverado 1500, N/A; Fits 2003-2014 Chevrolet Express 1500, N/A; Fits 2006-2011 Buick Lucerne, N/A; Fits 2006-2011 Cadillac DTS, N/A; Fits 2004-2008 Pontiac Grand Prix, N/A.

Quality Assurance

Four Seasons 36403 is built as an OEM-level replacement and meets or exceeds OEM requirements for the listed applications. The brass sensor body and OE-style connector layout support dependable service in compatible Chevrolet Silverado, GMC Sierra, and Express van applications.