The oxygen sensor installs in the downstream position on select 2006-2017 Cadillac, Chevy, GMC, Hummer and other applications. It 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 350-34494 Oxygen Sensor Features:

• Fits 2008-2014 Cadillac Escalade, Escalade ESV, Chevy Suburban 1500, Tahoe, GMC Yukon, Yukon XL 1500
• Fits 2008-2013 Cadillac Escalade EXT, Chevy Avalanche, Cheyenne, Corvette, Silverado 1500, Suburban 2500, GMC Sierra, Sierra 1500, Yukon XL 2500
• Also fits select Cadillac, Chevy, GMC, Hummer, Pontiac and Saturn applications
• Sensor locations by application: B1S2, B2S2 (bank and sensor number)
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 400 mm (15.7 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue