“Service transmission Now, unable to shift soon” message on 2021 Tahoe

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West1

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That is garbage.
All the modules store history codes..they could at least look.
Next time take a picture or a video of the code on the screen...harder to argue w/ evidence.
These dealers are really starting to tick me off...

I did take a picture and a video.
This morning it happened again and I drove to the dealer and kept the engine running. They scanned it and said there’s a ton of codes popping up with a low battery voltage. They said start with replacing the battery and go from there.

I also asked if I could swap the battery myself (since not a lot of people on the forum know the solid answer) and they said yes, no problem swapping batteries.

Off to buy a battery…
 

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