I simply read the stock tune from a 2011 Silverado E38, added 10% to the 'Torque Model' tables and flashed the tune into the ECM after licensing it.

My question is, being we dont necessarily have access to every table in this ECM, do we lose anything by flashing an EFILive tune over a stock cal?

I noticed it right away when I started so I let it be cause I had to drive 100 miles anyways today, but it was still idling much rougher after the trip.


Ideas, info?
Thanks!