http://www.mannesbilservice.se/tjans...9-5-2010-2011/

These maps are for EU only. I think it would be possible to devise new maps for US too, although latest maps I can get a hold on is from 2018.
Would that be an upgrade over what GM offers? I seem to remember GM sold maps newer than 2012 (which was the latest in Europe from GM) in the US.