Photo 1 of O2 Oxygen Sensor Upstream Downstream for Chevy Avalanche Silverado Suburban Tahoe, for GMC Sierra 1500 Classic Yukon XL 1500 2500 4.3 4.8 5.3 6.0L 2006-2007, Replace 234-4018 234-4337 4PCS

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Photo 1 of O2 Oxygen Sensor Upstream Downstream for Chevy Avalanche Silverado Suburban Tahoe, for GMC Sierra 1500 Classic Yukon XL 1500 2500 4.3 4.8 5.3 6.0L 2006-2007, Replace 234-4018 234-4337 4PCSPhoto 2 of O2 Oxygen Sensor Upstream Downstream for Chevy Avalanche Silverado Suburban Tahoe, for GMC Sierra 1500 Classic Yukon XL 1500 2500 4.3 4.8 5.3 6.0L 2006-2007, Replace 234-4018 234-4337 4PCS