O2 Sensor?

By cashflow50
February 23, 2010 in 1999-2013 Silverado 1500 & Sierra 1500

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cashflow50

Posted February 23, 2010

My engine light is iluminated on my 03 yukon. Would this be a bad O2 sensor? I sometimes have a hard time starting my vehicle after a long run. If it is the culprit and I want to replace my O2 sensor (the one on the driver side just below the manifold), can someone help please. Does anyone have a step by step procedure in doing this? Pictures will be helpfull for location. Thanks.

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