I had to post results. It works. I have never driven consistent enough to record numbers any better than 17 MPG but today I went on a 278.2 mile ride on 13 gallons of fuel and got 21.4 MPG. Stayed at 1800 RPM which is 65 MPH with 3:42 rear gear.

1. 1999 Suburban LT
2. 1500
3. 4X4
4. 1 on this ride
5. tune is #1
6. Kennedy mix of cetane and lubricity
7. 42 gallon
8. 3:42
9. 245/75/16
10. mud/snow
11. none
12. Peninsular non waste-gate
13. "
14. automatic
15. 195
16. Heath Computer
17. timing chain set
18. Kennedy Intercooler
19. no mist
20. Kennedy Air Box
21. no EGR
22. Peninsular non waste-gate
23. Kennedy 3.5 system, coated cross over and coated manifolds
24. -1.94
25. high pop
26. Amsoil 15/40
27. 21.4
28. 164K truck 2500 Peninsular 18.1 engine