Where to start? 09 GMC 1500 5.3 6 spd

[LaMountain]

Ok I have my EFI Live and I read my ECM and TCM. I made some changes to my shift points and recalibrated my speedometer for bigger tires. Now where is a good place to start to get more performance from the engine, not to drag race, just to run a little stronger?

Thanks
Pete

[joecar]

Hi Pete, welcome to the forum

First step is to take as many logs as you can, view them to understand how your powertrain is operating.

While viewing your logs, use the scantool->tunetool pid linking feature to highlight the operating cells in the various tables.

Some further reading is required: Tutorials