Compatibility: 2011-2013 Chevrolet Caprice 6.0L 2008-2009 Pontiac G8 6.0L 2009 Pontiac G8 6.2L 2004 Pontiac GTO 5.7L 2005-2006 Pontiac GTO 6.0L Q&A: Q:What is Differences Between upstream and downstream O2 Sensor? .
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