One Year Unlimited Mileage Quality Guarantee Before buying, check the [amazonconfirmedfit] check (Make, model, year, engine, Note,The engine and Note in particular) at the top of the link to see if your car can be used. 4PCS; Upstream + Downstream Fit 2015 Cadillac Escalade/ Escalade ESV 6.2L; Fit 2018-2020 Chevrolet Express 2500 4.3L; Fit 2017 Chevrolet Express 2500 4.8L; Fit 2017-2020 Chevrolet Express 2500 6.0L; Fit 2018-2020 Chevrolet Express 3500 4.3L; Fit 2017 Chevrolet Express 3500 4.8L; Fit 2017-2020 Chevrolet Express 3500 6.0L; Fit 2014-2018 Chevrolet Silverado 1500 4.3L; fit 2014-2016 Chevrolet Silverado 1500 5.3L; Fit 2014-2018 Chevrolet Silverado 1500 6.2L; Fit 2018-2020 GMC Savana 2500 4.3L; Fit 2017 GMC Savana 2500 4.8L; Fit 2017-2020 GMC Savana 2500 6.0L; Fit 2018-2020 GMC Savana 3500 4.3L; Fit 2017 GMC Savana 3500 4.8L; Fit 2017-2020 GMC Savana 3500 6.0L; Fit 2014-2018 GMC Sierra 1500 4.3L; Fit 2014-2016 GMC Sierra 1500 5.3L; Fit 2014-2018 GMC Sierra 1500 6.2L; Upgrade your vehicle's emission control system with our high-precision Sangyue 4PCS Oxygen Sensor Kit, designed to fit a wide range of 2014-2020 Chevrolet Silverado, GMC Sierra, and Cadillac Escalade models. This kit includes 2 upstream and 2 downstream sensors, ensuring comprehensive coverage for your engine. Manufactured with durable Aluminum and Stainless Steel, these sensors are built to withstand high temperatures up to 1600F (871C). They deliver accurate readings with a high measurement accuracy and a measuring range of 0 - 25%, translating into improved fuel efficiency and reduced emissions. The kit is backed by a one-year unlimited mileage warranty for your peace of mind.