Walker 211-2045 Engine Coolant Temperature Sensor - Radiator

Engine Coolant Temperature Sensor Overview

Walker 211-2045 is an engine coolant temperature sensor built to report cooling-system temperature data to the ECM in real time. It supports fuel delivery, ignition timing, cold-start enrichment, and cooling fan operation for accurate engine management.

Walker Sensor Only products are built to OE-style resistance values, thermal response, and signal output for direct integration with factory systems. This Walker coolant temperature sensor uses a blade terminal design with a female oblong connector and 2 terminals for a straightforward replacement on supported applications.

Key Features

• Engine coolant temperature sensor for ECM temperature input
• OE-matched resistance values, thermal response, and signal output
• Blade terminal type with 2 terminals
• Female oblong connector shape
• Heat-resistant construction for exposure to coolant and vibration
• Direct-fit replacement for factory-style installation
• Part number 211-2045 for ordering and cross-reference

Product Line Details

Walker Sensor Only focuses on replacement sensors rather than bundled service kits. For applications that call for a sensor-only service part, this line provides the electrical and thermal characteristics needed for accurate ECM temperature reporting without changing the original system design.

Fitment

• Fits 2024 Buick Envision, radiator; sensor only.
• Fits 2021 Buick Envision, radiator; sensor only.
• Fits 2022-2023 Buick Encore GX, location-thermostat housing; sensor only.
• Fits 2022-2023 Buick Envision, radiator; vendor #55489870; sensor only.
• Fits 2021-2023 Cadillac CT4, location-thermostat housing; sensor only.
• Fits 2022-2023 Cadillac CT5, radiator; vendor #55489870; sensor only.
• Fits 2022-2023 Cadillac XT4, location-thermostat housing; sensor only.
• Fits 2022-2023 Cadillac XT5, location-thermostat housing; sensor only.
• Fits 2022-2023 Cadillac XT6, location-thermostat housing; sensor only.
• Fits 2022-2023 Chevrolet Blazer, location-thermostat housing; sensor only.
• Fits 2023 Chevrolet Colorado, location-thermostat housing; sensor only.
• Fits 2021-2023 Chevrolet Silverado 1500, location-thermostat housing; sensor only.
• Fits 2022-2023 Chevrolet Trailblazer, location-thermostat housing; sensor only.
• Fits 2022-2023 GMC Acadia, location-thermostat housing; sensor only.
• Fits 2023 GMC Canyon, location-thermostat housing; sensor only.
• Fits 2021-2023 GMC Sierra 1500, location-thermostat housing; sensor only.
• Fits 2022 Chevrolet Silverado 1500 LTD, location-thermostat housing; sensor only.
• Fits 2022 GMC Sierra 1500 Limited, location-thermostat housing; sensor only.
• Fits 2020 Buick Encore GX, sensor only; includes O-ring.
• Fits 2020 Cadillac CT4, sensor only; includes O-ring.
• Fits 2020 Cadillac CT5, vendor #55489870; sensor only.
• Fits 2019-2020 Cadillac XT4, sensor only; includes O-ring.
• Fits 2020 Cadillac XT5, sensor only; includes O-ring.
• Fits 2020 Chevrolet Blazer, sensor only; includes O-ring.
• Fits 2019-2020 Chevrolet Silverado 1500, sensor only; includes O-ring.
• Fits 2020 GMC Acadia, sensor only; includes O-ring.
• Fits 2019-2020 GMC Sierra 1500, sensor only; includes O-ring.
• Fits 2019 Cadillac CT6, sensor only; includes O-ring.

What It Helps Address

• Incorrect coolant temperature readings sent to the ECM
• Check engine light related to coolant temperature sensor faults
• Hard cold starts or poor cold-start fuel enrichment
• Unstable fan operation caused by inaccurate temperature input
• Fuel economy and drivability issues tied to temperature signal errors

Installation Notes

Verify connector shape, terminal count, and mounting location before installation. This part uses a female oblong connector with blade terminals and does not include mounting hardware, a wiring harness, or thread sealer. On supported vehicles such as Buick Envision, Chevrolet Silverado 1500, and GMC Sierra 1500 applications, confirm whether the sensor mounts at the radiator or thermostat housing before replacement.

Quality Assurance

Walker engineers this coolant temperature sensor to match OE specifications for resistance, thermal response, and signal output. The heat-resistant construction is built for continuous exposure to coolant, vibration, and temperature cycling in factory-style cooling systems.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.