ACDelco 12679686 Heated Oxygen Sensor

The ACDelco 12679686 is a GM Genuine Parts heated oxygen sensor designed for 2019-2020 Cadillac CT6 vehicles equipped with the 4.2L twin-turbo engine. This OEM-quality sensor is engineered to detect oxygen content in exhaust gases, helping optimize emissions and maintain proper engine performance.

Key Features:

• GM Genuine Parts quality - designed, engineered, and tested to rigorous GM standards
• Heated oxygen sensor technology for faster sensor operation and more accurate readings
• Detects oxygen content in exhaust gases to help the engine control module optimize air/fuel mixture
• Direct-fit replacement for original equipment
• Position: Bank 2, Sensor 1 (upstream)
• Backed by General Motors warranty

Important Installation Note: This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle. Professional installation is recommended.

Oxygen sensors play a critical role in engine management by monitoring exhaust gases and providing feedback to the vehicle's computer system. This allows the engine control module to adjust the fuel mixture for optimal performance, fuel economy, and emissions control.