Photo 1 of Oxygen O2 Sensor Upstream and Downstream Fits for Chevy GMC Avalanche Silverado Sierra 1500 Classic Suburban Yukon XL 1500 2500 Tahoe 4.3L 4.8L 5.3L 6.0L 2006-07, for Cadillac Escalade 6.2L 2007 4PCS

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Photo 1 of Oxygen O2 Sensor Upstream and Downstream Fits for Chevy GMC Avalanche Silverado Sierra 1500 Classic Suburban Yukon XL 1500 2500 Tahoe 4.3L 4.8L 5.3L 6.0L 2006-07, for Cadillac Escalade 6.2L 2007 4PCSPhoto 2 of Oxygen O2 Sensor Upstream and Downstream Fits for Chevy GMC Avalanche Silverado Sierra 1500 Classic Suburban Yukon XL 1500 2500 Tahoe 4.3L 4.8L 5.3L 6.0L 2006-07, for Cadillac Escalade 6.2L 2007 4PCS