The oxygen sensor installs in the downstream position on select 2006-2015 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 350-34513 Oxygen Sensor Features:

• Fits 2006-2010 Cadillac STS; 2007-2009 Cadillac SRX; 2009-2015 Cadillac CTS; 2008-2012 Chevy Malibu; 2008-2010 Chevy Silverado 3500, 3500 HD, GMC Sierra 3500 HD
• Fits 2009 Chevy Captiva Sport, Hummer H2; 2008-2009 Pontiac G6, Saturn Aura
• Engine coverage includes 3.6L V6, 4.4L V8, 4.6L V8, 6.0L V8, 6.2L V8 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, 675 mm (26.6 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue