2004 GMC Sierra 8.1 with no throttle response

[Screaminxl]

Hey,

I have 2004 GMC Sierra 8.1 w/allison. It runs well stock. I loaded the 87 tune and it now has almost no throttle response when taking off from a dead stop. Once it shifts to second and above 3,000 RPM's it seems to run ok. I loaded the original backup so I could drive the truck.

What can be done to fix this problem?

What info do you need from me?

Thanks.

[Screaminxl]

Here is the original tune and 87 tune.

Used gm_j1850 1r13c

[mikel]

Here is the original tune and 87 tune.

Used gm_j1850 1r13c

here you go