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Are you sure the problem is rooted in tuning? Perhaps check the connector and pins on the ecm harness and the two on the engine harness. I have seen a similar diagnoses from a harness/pin problem in...

Positive it was LBZ

I am between Lexington and Louisville.

I cannot read the current tune

I cannot install the stock tune

I have a remote start that I will remove and attempt again today.

Batteries are fully charged.

Doors are closed.

I have a 2006 Duramax LBZ that I am having major issues with. I have attempted a full flash to install a DSP5 tune. The V2 sends an error message at 7:07 on the countdown timer. This is also at 191k...

Bump

Bump. Any new news on this issue?

Ross, Have you any luck with this problem? Is this the same issue that plagues us in 4wd low range as well?