Is it my tune??

[Houston Ben]

Hi All,
I have a weird problem (or maybe it is normal IDK)with my setup. 2011 truck 5.3 with original 6L80. When I mash the gas it will peel out 1-2 gears but once it hits 3rd it feels like the engine is stalled out (loss of power) and then will kick down and take off again.

I compare this to my Nissan Armada, when traction control kicks in, the Armada pedal has no response to input. It feels like the engine and trans stall or shut down until the wheels quit slipping and then it will take off.

Is this normal or do you think maybe the traction control fro 3rd gear is still on (if possible)?

I don't do this but every once in a while when I get a wild hair and there is no one around, but it still bugs the crap out of me as I don't think this should be happening.

Thanks for any help,

Ben