Photo 1 of Oxygen O2 Sensor Upstream and Downstream Fits for Chevy Avalanche Suburban Silverado 1500 2500 3500HD Tahoe, for GMC Sierra Yukon XL 2008-2012 4.8 5.3 6.0 6.2L Replace 234-4668 234-4256 4PCS

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Photo 1 of Oxygen O2 Sensor Upstream and Downstream Fits for Chevy Avalanche Suburban Silverado 1500 2500 3500HD Tahoe, for GMC Sierra Yukon XL 2008-2012 4.8 5.3 6.0 6.2L Replace 234-4668 234-4256 4PCSPhoto 2 of Oxygen O2 Sensor Upstream and Downstream Fits for Chevy Avalanche Suburban Silverado 1500 2500 3500HD Tahoe, for GMC Sierra Yukon XL 2008-2012 4.8 5.3 6.0 6.2L Replace 234-4668 234-4256 4PCS