Chevrolet GM Buick Air-Fuel Ratio Oxygen Sensor 12639692/234-4530

This air-fuel ratio oxygen sensor is designed for 2007-2013 Chevrolet Silverado 1500 (5.3L V8), Buick Lucerne (3.9L V6), and GM Yukon (6.2L V8) and other General Motors vehicles. Reads oxygen content in exhaust in real time and feeds data to the engine control unit to optimize air-fuel ratio, improving fuel economy and reducing emissions. OEM numbers include 12639692, 234-4527, 234-4528, 234-4529, and 234-4530 for cross-checking stock. Replacement difficulty is intermediate; use a dedicated oxygen sensor socket to avoid thread damage; after installation, clear fault codes and perform road test. As a B2B buyer, this sensor is compatible with multiple OEM numbers and covers common Chevrolet, Buick, GMC models, reducing stocking pressure.