'05 Silverado 1500 6.0 L Tune Options?

[JohnT.]

I just bought a Trinity 1000 on a salesman's recommendation in response to my desire to down tune my pickup for low performance commuter/highway driving. I am not a young fellow looking for 'chick-attracting performance'.
As there is no in depth info detailed tune options available for reading or online viewing, I took his word for it.
After installing the unit in my truck, and trying to select from the listed tuning options, I am confused on which option actually provides me with the 'Economy' tune. There is only generic descriptions covering the 3 possible tune options, 2 of which both state that they 'iincrease power and torque without increasing fuel consumption' or something like that?
No 'Performance; Towing; or Economy' headings to guide a person.
Did I just purchase the wrong product?
Did I just break the seal on a non-returnable $750.00 cardboard box?
Or have I not set it up properly?
Help is most appreciated.

[mikel]

Any of the tunes will improve mileage ideally.

For best results, try the 87 octane tune and keep driving style the same, and you'll see 1-2 MPG increase.

Thanks

[JohnT.]

Thanx for the reply Mike.
I have been monitoring my mileage via the instrument display for a month now and have noted a change from 16.3 L/100km to 16.4 L/100km as of yesterday. It has actually gone up a little with the same driver.
I have been patiently optimistic after convincing my wife that we REALLY needed this device, but I don't see an improvement.
How long should I wait?