Standard Ignition TX108 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for GM Applications

Standard Ignition TX108 is an engine coolant temperature sensor built for accurate temperature measurement and reliable engine management feedback. It uses a brass body, a round female connector, and a bolt-on attachment method for a direct-fit service replacement on select Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab vehicles.

Fits 2002-2005 Chevrolet Trailblazer, N/A; Fits 2002-2005 Chevrolet Trailblazer EXT, N/A; Fits 2002-2005 GMC Envoy, N/A; Fits 2002-2005 GMC Envoy XL, N/A; Fits 2004-2005 Buick Rainier, N/A; Fits 2004-2005 GMC Envoy XUV, N/A; Fits 2003-2005 Isuzu Ascender, N/A; Fits 2005 Saab 9-7x, N/A; Fits 2002-2004 Oldsmobile Bravada, N/A.

Key Features

• Engine coolant temperature sensor for monitoring coolant temperature at the engine
• Brass construction for durable sensor body performance
• Bolt-on attachment method for secure mounting
• Female round connector with 1 connector interface
• 2 blade/slide male terminals for electrical connection
• Factory-tested for consistent operation before shipment
• Built with tight thermistor response tolerances to support accurate readings

Detailed Description

Standard Ignition TX108 is engineered for vehicles that rely on precise coolant temperature input for engine control, fuel strategy, and temperature-related diagnostics. The sensor design focuses on controlled thermistor response values so the signal sent to the vehicle system stays accurate under normal operating conditions. This part cross-references Four Seasons 37866 for the same application.

For shoppers searching for a coolant temperature sensor for a 2002-2005 Chevrolet Trailblazer, GMC Envoy, or 2004-2005 Buick Rainier, TX108 provides a direct replacement option with the correct connector style and terminal layout. It also serves select Isuzu Ascender, Oldsmobile Bravada, and Saab 9-7x applications.

Common Problems This Part Can Help Address

• Incorrect coolant temperature readings on the dash or scan tool
• Hard starting or poor cold-engine fuel control caused by inaccurate temperature input
• Cooling fan operation concerns tied to faulty temperature signal data
• Check engine light conditions related to coolant temperature sensor faults
• Rough engine performance when the engine control system receives unreliable temperature information

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. TX108 uses a bolt-on design with a round female connector and 2 male blade/slide terminals, so the replacement should match the original sensor connection exactly. Inspect the connector and wiring for corrosion or damage before installing the new sensor, and confirm the cooling system is at a safe temperature before service.

Quality Assurance

Standard Ignition controls manufacturing from component selection through finished product assembly. TX108 is 100% factory tested, and its thermistor response is specified for tight tolerance temperature measurement to support dependable operation in service.