Need helps

[LQ4-TURBO]

OK am a little confused I've had several people tell me conflicting answers.

If I got a segment swap down on a 4l80e would the trans shift like normal or would it still not shift right tell after it has been tuned? I'm not sure to pay for a trans tune or order an ignition switch etc?


One more thing the truck has been tuned for the engine that's in it but it doesn't what to idle sometimes it will sometimes it wont. When it does idle if I press on the gas it will wont to die. When this info and all the codes that I have could this be something else not related to tuning? Meaning would these codes show up if you swapped in the 4l80e and the truck hasn't been tuned for the 4l80e or could it just be that it might need a ignition switch or something else?

Thanks