13444 Oxygen Sensor O2 Sensor Upstream Downstream Replacement Compatible With Buick Cadillac Chevrolet GMC Isuzu Oldsmobile Pontiac 234-4087, 21528, ES20002, SG277, AFS97, AFS123, 12578459, 12587214

Please kindly check the YEAR/MAKE/MODEL of your vehicle based on our product description to make sure this item is compatible.Package Includes: 1x Oxygen Sensor Professional and Fast Service We have confidence in making you have a happy online-shipping experience. Fitment: Buick Lucerne 4.6L 2006 2007 2008 2009 2010 2011 Downstream Cadillac DTS 4.6L 2006 2007 2008 2009 2010 2011 Downstream Chevy Colorado 5.3L 2009 2010 2011 2012 Upstream Chevy Silverado 1500 4.3L 2007 2008 2009 2010 2011 2012 Upstream Chevy Silverado 1500 4.8L 2006 2007 Upstream Chevy Silverado 1500 5.3L 2006 Upstream Chevy Silverado 1500 Classic 4.3L/4.8L/5.3L 2007 Upstream Chevy Suburban 1500 5.3L 2006 2007 Upstream Chevy Suburban 1500 6.0L 2007 Upstream Chevy Suburban 2500 6.0L 2007 Upstream Chevy Tahoe 4.8L/5.3L 2006 2007 Upstream GMC Canyon 5.3L 2009 2010 2011 2012 Upstream GMC Sierra 1500 4.3L 2007 2008 2009 2010 2011 2012 Upstream GMC Sierra 1500 4.8L 2006 2007 Upstream GMC Sierra 1500 5.3L 2006 Upstream GMC Sierra 1500 Classic 4.3L/4.8L/5.3L 2007 Upstream GMC Yukon 4.8L/5.3L 2006 2007 Upstream GMC Yukon 6.2L 2007 Upstream GMC Yukon XL 1500 5.3L 2006 2007 Upstream GMC Yukon XL 1500 6.0L/6.2L 2007 Upstream GMC Yukon XL 2500 6.0L 2007 Upstream H3 5.3L V8 2008 2009 2010 Upstream H3T 5.3L V8 2009 2010 Upstream H2 6.2L V8 2008 2009 Upstream H2 6.0L V8 2007 Upstream

• The oxygen sensors (also called O2 sensors) A finely tuned fuel injection system with an oxygen sensor can maintain an air/fuel ratio within a close tolerance of 0.02 percent. Keeping the engine at the stoichiometric ratio (14.7:1 air/fuel ratio) helps the engine generate the most power with the least amount of emissions.
• Some of the symptoms of a failed oxygen sensor system are: Irregular idle during warm-up, irregular idle with warm engine, engine will not accelerate and backfires, poor engine performance, fuel consumption is high, and driving performance is weak, CO concentration at idle is too high or too low, check Engine Lamp is illuminated.
• Before placing orders Please check the wire length & plug & position to confirm the compatibility. Please check it the same as your original before you make an order,it would save you some headache and time.
• Interchange Number: 234-4087, 21528, ES20002, SG277, AFS97, AFS123, 12578459, 12587214. Directly Fit your vehicle when the plug and the length is the same as your original sensor.
• See more specific model in the description, please confirm this item fits your vehicle before purchase. We value your shopping experience and strive to offer a high-quality product and service.And if you have any other problem, contacting us and we will serve you within 24 hours.