Photo 1 of O2 Oxygen Sensor Upstream and Downstream for Cadillac Escalade, for Chevy Avalanche Suburban Silverado 1500 2500 3500 HD, for GMC Sierra Yukon XL 1500 2500 06-07 4.3 4.8 5.3 6.0L, 234-4337 234-4018

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Photo 1 of O2 Oxygen Sensor Upstream and Downstream for Cadillac Escalade, for Chevy Avalanche Suburban Silverado 1500 2500 3500 HD, for GMC Sierra Yukon XL 1500 2500 06-07 4.3 4.8 5.3 6.0L, 234-4337 234-4018Photo 2 of O2 Oxygen Sensor Upstream and Downstream for Cadillac Escalade, for Chevy Avalanche Suburban Silverado 1500 2500 3500 HD, for GMC Sierra Yukon XL 1500 2500 06-07 4.3 4.8 5.3 6.0L, 234-4337 234-4018