Oxygen Sensor 234-4012 Upstream O2 Sensor 1 for Cadillac GMC Sierra 1500 2500 Chevrolet Avalanche Silverado Tahoe COMPATIBLE WITH OEM:13026, 234-4012 Length (Sensor to Lead): 400 mm ( 15.74 inch).Wires: 4 Oxygen Sensor Upstream 13026 234-4012 Replacement For Cadillac Chevrolet GMC O2 Oxygen Sensor Upstream 234-4012 For Cadillac GMC Sierra 1500 2500 Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase. Warranty: 1 year unlimited miles.