So I just returned from the shop and all is good for now. They cleared the code and advised to put in 2wd when shutting down as you said. Hopefully they come up with a fix for this. I know I'll forget one day. Haha
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Shutting down with 2wd selected didn't do anything for me. Still stuck in 4. I got a service appointment for Friday so we'll see how that goes.
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Wow! Can't handle the cold? What a joke. Mine just started acting up since having the transfer case recall done. I'll have to try the 2wd shutoff option and see if that helps.
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Having this issue on my '14 Sierra too. Just started today, 6 days after having the transfer case recall done. Mine seems to be stuck in 4hi. Hopefully gm gets this sorted out.
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