Denso part number 234-4337 is a replacement oxygen (O2) sensor for 2006-2011 Buick Lucerne, 2006-2011 Cadillac DTS, 2007 Cadillac Escalade, 2007 Cadillac Escalade ESV, 2007 Cadillac Escalade EXT, 2006 Chevrolet Avalanche 1500, 2007 Chevrolet Avalanche, 2009-2012 Chevrolet Colorado, 2006-2013 Chevrolet Silverado 1500, 2007 Chevrolet Silverado 1500 Classic, 2006-2007 Chevrolet Suburban 1500, 2007 Chevrolet Suburban 2500, 2006-2007 Chevrolet Tahoe, 2009-2012 GMC Canyon, 2006-2013 GMC Sierra 1500, 2007 GMC Sierra 1500 Classic, 2006-2007 GMC Yukon, 2006-2007 GMC Yukon XL 1500, 2007 GMC Yukon XL 2500, 2007-2009 Hummer H2, 2008-2010 Hummer H3, and 2009-2010 Hummer H3T vehicles. Denso Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled performance. Each component is precision built for exact replacement, and a first time fit. This innovative line features Denso's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead poisoning for improved engine performance, greater fuel efficiency, and unparalleled longevity. Denso gives you the right part and the right fit, the first time.