P0381 code, 2025 2500 Duramax

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Code for the Wait to Start circuit. Popped up three weeks ago, so I cleared it and this morning it popped up again. Anyone know of a TSB addressing this, other than the generic 24-NA-215?
 
Could be a glow plug going bad, glow plug module or loose connections/ fuse. You can test the ohm resistance with a tester to track it down but if it's still under warranty it's easier to let someone else deal with it.
 
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