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2023 LZ0 3.0L Duramax Diesel DEF Level Issues

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Loadmaster

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Vehicle Details

2023 GMC Sierra Denali with a LZ0 3.0L Duramax Diesel.  It has 7,300 miles in total.

Issue

DEF Level indicator not reporting proper fluid level.  At startup, with DEF tank full, the center dash display shows “DEF Range 200 mi”.  If the level drops by one gallon below full, the display shows “DEF Level Empty” and you can not use any of the other center dash displays.  It locks the display and only shows “DEF Level Empty”.

Appointment With Dealer

After arriving for my appointment and explaining the above for the second time, 1 hour and 20 minutes, they said I was all set.  They didn’t perform SB # 22-NA-150.  They reset the DEF system and cleared its data.  This seems to have corrected the issue, but I’m not confident that this is a long-term solution.  The DEF level indicator still is reading less than full when the tank is, like it will show no higher than ¾ full.

Anyone else having this issue?  Any long term fix?

23-12-13 DEF of Sierra 0.jpg

23-12-13 DEF of Sierra 1.jpg

23-12-13 DEF of Sierra 2.jpg

23-12-13 DEF of Sierra 3.jpg

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