Standard Ignition TX348 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for GM Applications

Standard Ignition TX348 is an engine coolant temperature sensor built for direct replacement in select Cadillac, Chevrolet, and GMC applications. It uses a bolt-on attachment method with a single oval female connector and male blade terminal design for a straightforward OE-style connection.

Key Features

• Engine coolant temperature sensor for monitoring coolant temperature at the engine or coolant outlet
• Bolt-on attachment method with M8 x 1.25 thread size and NPT thread type
• Oval 1-port connector with female plug/socket connection
• Black and bronze plastic finish
• Terminal design: 1 + 1 male blade terminals
• No bulb, wiring harness, or mounting hardware included
• Cross-reference part numbers include 12673064 and TS7338

Detailed Description

Standard Ignition TX348 is an engine coolant temperature sensor used to report coolant temperature data to the vehicle’s engine management system. Accurate temperature input helps the system manage fuel delivery, idle strategy, and cooling fan operation. This part number, TX348, is listed for 2019-2025 Chevrolet Silverado 1500 and GMC Sierra 1500 models located on the coolant outlet, plus 2020-2025 Cadillac CT4, 2023-2025 Chevrolet Colorado, and 2023-2025 GMC Canyon models located on the cylinder head. It also covers 2022 Chevrolet Silverado 1500 LTD and 2022 GMC Sierra 1500 Limited in the coolant outlet location.

This Standard Ignition TX348 sensor is a direct-fit style replacement for vehicles that use the specified thread, connector, and mounting configuration. It is a practical choice when servicing a faulty coolant temperature sensor on a Chevrolet Silverado 1500, GMC Sierra 1500, Cadillac CT4, Chevrolet Colorado, or GMC Canyon.

What It Helps Address

• Incorrect coolant temperature readings on the dash or scan tool
• Hard starting, rough idle, or poor cold-start behavior tied to temperature input
• Cooling fan operation that does not match engine temperature
• Check engine light concerns related to coolant temperature sensor performance
• Fuel control issues caused by inaccurate engine temperature data

Installation Notes and Tips

Verify the connector shape, thread size, and mounting location before installation. TX348 uses a bolt-on design with an M8 x 1.25 NPT thread, so the sensor must match the original engine or coolant outlet configuration. Inspect the connector terminals and sealing surfaces during service, and confirm the replacement is installed in the same location noted for your vehicle.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and engine management components. TX348 is built to match the listed application details for proper fitment and reliable sensor replacement.