{"product_id":"gm-genuine-parts-afs138-heated-oxygen-sensor-19178961-oe-quality-fits-1999-2002-gm-vehicles","title":"GM Genuine Parts AFS138 Heated Oxygen Sensor (19178961) – OE Quality, Fits 1999–2002 GM Vehicles","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eGM Genuine Parts AFS138 heated oxygen sensor (19178961) is an authentic OE replacement purposefully designed for GM vehicles. This sensor monitors the oxygen content in exhaust gases as they exit the engine, providing feedback to the engine control module (ECM). By delivering real-time data, it helps the ECM adjust the air–fuel ratio toward the near-ideal balance of about 14.7:1. While individual results can vary with driving conditions and vehicle history, a properly functioning sensor can contribute to steadier idle, smoother acceleration, and more consistent performance across a wide range of temperatures and loads.\u003c\/p\u003e\n\u003ch3\u003eKey benefits and what to expect\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDetects oxygen levels in exhaust to support efficient combustion and potentially cleaner emissions\u003c\/li\u003e\n  \u003cli\u003eGM-recommended replacement part that mirrors the original factory component for your GM vehicle\u003c\/li\u003e\n  \u003cli\u003eOffers the reliability and durability associated with GM OE parts\u003c\/li\u003e\n  \u003cli\u003eManufactured to GM OE specifications for precise fit, form, and function\u003c\/li\u003e\n  \u003cli\u003eConnector Gender: Female, simplifying installation and connection\u003c\/li\u003e\n  \u003cli\u003eFits multiple GM models, including Chevrolet, Cadillac, and GMC trucks and SUVs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility and installation basics\u003c\/h3\u003e\n\u003cp\u003eThis sensor is designed to align with GM’s original specifications, ensuring compatibility with the listed models. The female connector orientation supports a secure electrical connection and reliable operation after replacement. During installation, follow standard safety steps: disconnect the battery, allow the exhaust system to cool, and consult your vehicle’s service manual for torque guidelines and any GM-recommended lubrication or anti-seize processes. The goal is a clean, snug interface that resists future loosening and corrosion while preserving sensor performance over time.\u003c\/p\u003e\n\u003ch3\u003eReal-world use cases\u003c\/h3\u003e\n\u003cp\u003eIn everyday driving, a well-functioning O2 sensor can contribute to smoother starts, steadier cruising, and consistent throttle response. It may help the ECM manage the air–fuel mixture more effectively across varying loads, which can translate to steadier engine behavior during city stops and highway cruising alike. Remember, actual outcomes depend on vehicle condition, sensor age, and driving habits.\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the detail\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOE-grade construction and material quality designed to endure heat and vibration\u003c\/li\u003e\n  \u003cli\u003eGM OE specification adherence ensures proper fit and function\u003c\/li\u003e\n  \u003cli\u003eFemale connector design supports straightforward wiring hook-up\u003c\/li\u003e\n  \u003cli\u003eModel coverage includes Chevrolet Avalanche 1500, Tahoe, Suburban 1500, Silverado 1500 (1999–2002), Silverado 2500 (1999–2000), Cadillac Escalade (2002), GMC Yukon\/Yukon XL 1500, Sierra 1500 (1999–2002), and Sierra 2500 (1999–2000)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What does the GM Genuine Parts AFS138 sensor do?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It detects oxygen content in exhaust to help the engine control module optimize the air-fuel mix.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which GM vehicles does it fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits several GM models listed for 1999–2002 Silverado, Tahoe, Suburban, Yukon, Sierra, and select Cadillac Escalade versions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GM GENUINE PARTS","offers":[{"title":"Default Title","offer_id":42470921502805,"sku":"B000C9PZHM","price":76.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/gm-genuine-parts-afs138-heated-oxygen-sensor-closeup.jpg?v=1778156321","url":"https:\/\/plentytorque.co.uk\/products\/gm-genuine-parts-afs138-heated-oxygen-sensor-19178961-oe-quality-fits-1999-2002-gm-vehicles","provider":"PlentyTorque","version":"1.0","type":"link"}