MOSTPLUS O2 Oxygen Sensor 15284 SG1857 (Set of 4)

Fitment: Compatible for 2003-2005 Chevrolet Silverado 1500 5.3L,Compatible for 2003-2005 Chevrolet Tahoe 5.3L,Compatible for 2003-2005 GMC Sierra 1500 5.3L,Compatible for 2003-2005 GMC Yukon 5.3L Interchange Part Number: 234-4668, 15284, 21546, SG1857 (Pls make sure the part number before purchase!) Product Specifications: Package Includes--4 x Oxygen Sensor(Same Model); Terminal Gender--Male; Pin Quantity--4 Feature: The key parts including chip from top supplier; Quicker response times; 100% test before shipment; Stock parts direct replacement and with pre-coated threads to help installation; reduce harmful emissions, increase fuel economy, improve engine performance and prevent premature failure of the catalytic converter. Tip: Bank 1 Sensor 1=Upstream Right/Rear; Bank 2 Sensor 1=Upstream Left/Front; Bank 1 Sensor 2=Downstream Right/Rear; Bank 2 Sensor 2=Downstream Left/Front; sensor 1=Upstream, sensor 2=Downstream. Looks and appears new, unused, and in excellent condition. See pic