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So I guess later I could update my os. For now, would that last tune i loaded work for my 2004 tahoe 4l80e?
I am trying to get thst part right before I begin tweaking things, as the truck has a...

To follow up, there are several 2004 tunes with 4l80e files os12585950 that do not look like my others.

My 2003 tahoe file even looks different that my 2004.

Long story short, I am attaching a...

Here are 3 files I am comparing. The 2004 Tahoe Z71 is the stock tune for my tahoe I swapped the 4l80e into.

The repository file is the file that was pointed out that has the correct os.

The...

Hey, I appreciate the help. And I mean no harm. I just swapped the 4L80E into my tahoe thinking the tune would be the easy part. I have piddled with hptuners for years, but am very amateur. I didn't...

Please check that file out. The tranny settings aren't correct for a 4l80e. I already tried that one. It seems to have 4l60e settings. I compared to it to several 4l80e tunes I have.

My other...

I have a 2004 Tahoe flex fuel i have swapped a 4l80e in. The pcm has os 12585950, and I cannot find a good file with that os to segment swap. My 2003 Tahoe flex fuel has os 12579405, as do several of...

Any chance someone has a file for operating system 12585950 with a 4l80e tune? I have swapped a 4l80e into my 2004 tahoe, but it seems none of the files in the tune repository that actually have a...

sorry, i'm new to tuning. i may add a little tm back. i'll try to get my file up soon, and thanks for the advice.

I have a 2005 crew cab silverado 5.3 auto with 3.23 gears. only mod is slp intake. after removing all tm and disabling abuse mode, truck still bogs on take off and a little between each shift. ...