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Message: <blockquote data-quote="ricklack" data-source="post: 17454" data-attributes="member: 2162">My failure began June 6, I forgot to post in this forum - so here is the issue with posts separated, hope it makes more sense that way.  first post Jun 6:Dealer says it is a known issue with a TSB - #PIT5913 Dated May 6, 2022. Document ID 6071296.Almost all GM models are impacted, model years 2021 &2022 - but the Equinox and Terrain affected are only 2022. It includes all VINs.It is most commonly an intermittent issue, in my case it is a hard error. Nav will not load as it does not detect the inserted SD card with the maps it needs."GM says engineering has identified the cause of the issue and is working on updated software to remedy this situation."</blockquote>