Photo 1 of 4PCS Oxygen Sensor Upstream Downstream O2 Sensor Compatible with 2006-2007 Chevy Avalanche Silverado Suburban 1500 Tahoe, GMC Yukon Yukon XL Sierra 1500, Cadillac Escalade Replace 234-4018 234-4337

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Photo 1 of 4PCS Oxygen Sensor Upstream Downstream O2 Sensor Compatible with 2006-2007 Chevy Avalanche Silverado Suburban 1500 Tahoe, GMC Yukon Yukon XL Sierra 1500, Cadillac Escalade Replace 234-4018 234-4337Photo 2 of 4PCS Oxygen Sensor Upstream Downstream O2 Sensor Compatible with 2006-2007 Chevy Avalanche Silverado Suburban 1500 Tahoe, GMC Yukon Yukon XL Sierra 1500, Cadillac Escalade Replace 234-4018 234-4337Photo 3 of 4PCS Oxygen Sensor Upstream Downstream O2 Sensor Compatible with 2006-2007 Chevy Avalanche Silverado Suburban 1500 Tahoe, GMC Yukon Yukon XL Sierra 1500, Cadillac Escalade Replace 234-4018 234-4337