This 4-wire narrow-band oxygen sensor fits select 2014-2023 Cadillac, Chevy and GMC applications and signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 250-241162 Oxygen Sensor Features:

• Fits 2015-2020 Cadillac Escalade, Escalade ESV, Chevy Suburban, Tahoe, GMC Yukon, Yukon XL; 2018-2019 Cadillac ATS, CTS; 2019-2020 Cadillac CT6
• Fits 2014-2017 Chevy Cheyenne, Silverado 2500, GMC Sierra; 2014-2019 Chevy Silverado 1500, GMC Sierra 1500; 2016-2020 Chevy Express 2500, 3500, GMC Savana 2500, 3500
• Also fits select Cadillac, Chevy and GMC applications
• Sensor locations by application: B1S1, B1S2, B2S1, B2S2 (bank and sensor number)
• Used in both upstream and downstream positions, depending on application
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 350 mm (13.8 in.) overall length
• Male/female oblong connector at the harness end with 4 blade terminals
• Platinum electrode layer with a protective coating against combustion residue