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Message: <blockquote data-quote="bmarshall3" data-source="post: 19071" data-attributes="member: 6616"><p>I have a 2016 Equinox with a 4.2L. There have been two aftermarket converters insalled but the p0420 code keeps coming back. I'm being told the only to resolve this is to install an OEM converter from Chevy and not use aftermarket. Does anyone know if this correct? I find it hard to believe there is not a compatible aftermarket converter what will correct my issue without spending $1400 for an OEM converter. Any suggestions would be greatly appreciated.</p></blockquote><p></p>