Motorsport Technologies in Houston, TX does sme of the best Dyno tunes around in my opinion. they just did mine about 3 days ago and i wouldn't have it any other way. They definitley get my vote.
Here are my Sheets. Bear in mind i have a 5.3L Sierra
Curve By RPM
Curve By Speed
Baseline Chart
Tuned Chart
visit there website a www.motorsporttech.com
they will do you right. I had to wait a while because they were taken a long time on a 455ci GTO so they gave me a discount.