Your welcome. MVI also has some great options, take a look
https://www.gm-navigation.com/never-suffer-a-blind-spot-scare-again/
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Try this, Might be even better
http://www.gmc.com/gmc-life/trucks/trailering-enhancements-for-2016-sierra.html
http://echomaster.com/catalog/home/intellihaul-for-silverado-and-sierra-with-standard-side-mirrors
http://echomaster.com/catalog/home/intellihaul-for-silverado-and-sierra-with-trailering-extension-mirrors
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