Standard Ignition TX3 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for GM Applications

Standard Ignition TX3 is an ambient air temperature sensor built for direct replacement service on a wide range of GM cars, trucks, and vans. It uses a screw-in mounting style with a round female connector and male pin terminals for a secure electrical connection.

With fitment across Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac DTS applications, TX3 supports accurate outside temperature input for HVAC and engine management systems.

Key Features

• Screw-in ambient air temperature sensor design
• Black and gold housing with proprietary brass casing construction
• Round 1-connector design with female connector gender
• 2 male pin terminals for reliable signal transfer
• 3/8-18 thread size, also listed as 18MM x 1.50
• Environmental tested and end-of-line tested for linearity and function

Detailed Product Overview

Standard Ignition TX3 is engineered as an ambient air temperature sensor for vehicles that rely on accurate outside temperature data for HVAC operation and engine control inputs. The brass-cased sensor body is built for durability, while the connector design is crafted for proper fitment and dependable electrical contact. This part cross-references Four Seasons 36403 for the same application.

Compatible With 1999-2014 Chevrolet Silverado 1500, 2001-2009 Chevrolet Silverado 2500 HD, 2007-2009 Chevrolet Silverado 3500 HD, 1999-2013 GMC Sierra 1500, 2001-2009 GMC Sierra 2500 HD, and 2007-2009 GMC Sierra 3500 HD. It also fits many Buick, Cadillac, GMC, Pontiac, Isuzu, and Chevrolet passenger and light-duty truck applications listed below.

What This Sensor Helps Resolve

• Incorrect outside temperature readings on the dash or climate display
• HVAC control issues tied to ambient temperature input
• Faulty sensor signal caused by worn connector terminals
• Intermittent temperature data from damaged or corroded sensor bodies
• Replacement needs after sensor failure on GM ambient air temperature circuits

Installation Notes and Tips

TX3 installs with a screw-in attachment method and does not include hardware, a mounting bracket, or a wiring harness. Verify the thread size before installation and confirm connector style, terminal count, and vehicle-specific fitment details against the original part. Some listed applications note special configurations such as without connector, sensor only, or 2-terminal fitment.

For best results, inspect the connector for corrosion or terminal damage before installation. Confirm the sensor location on the vehicle, as some applications place the sensor in the front fascia area, water pump crossover pipe, or other model-specific locations.

Quality Assurance

Standard Ignition manufactures this sensor with environmental testing and end-of-line testing to verify function and linearity specifications. The brand’s temperature sensor construction focuses on durable materials and consistent electrical performance for service replacement use.