LZ0 Engine Misfires

[2024 White Tahoe]

GM is investigating potential LZ0 engine misfires: https://gmauthority.com/blog/2025/11/gm-investigating-occasional-duramax-diesel-lz0-engine-misfires/

Post and title edited to correct the RPO engine listing.

 

[Fless]

Do you mean LZ0?

 

[Skiwagon25]

I have been experiencing this symptom, I though it was the transmission. As stated, occurs during downshifts at highway speeds from 10th gear to 9 or 8 after extended highway driving, does not occur all the time, but for me seems to happen most often when the car is at operating temps.

 

[fastpete]

shutter experienced this past weekend. Like above I thought it may be the trans, however seems more likely a misfire(s) at this point