Photo 1 of 234-4940 Upstream OEM Oxygen (O2) Sensor Compatible with Chevy Silverado 1500, GMC Sierra 1500, Yukon, Suburban, Tahoe, Escalade ESV, Replaces 12659516

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Photo 1 of 234-4940 Upstream OEM Oxygen (O2) Sensor Compatible with Chevy Silverado 1500, GMC Sierra 1500, Yukon, Suburban, Tahoe, Escalade ESV, Replaces 12659516Photo 2 of 234-4940 Upstream OEM Oxygen (O2) Sensor Compatible with Chevy Silverado 1500, GMC Sierra 1500, Yukon, Suburban, Tahoe, Escalade ESV, Replaces 12659516