programer for a gas truck?

[niterydr]

the HP Credits were $100. I need to pick up a universal wideband for tuning other cars anyway, so I won't count that cost.
Filter was $40 ish?

I have a 1/2 dozen hours into tweaking/researching/reviewing logs so far, more to come.

[jrohner]

You have the 6.0 gas hog, you have big tires, you have a lift kit. All are strikes against you for gas mileage, and now you're wondering what to do to get better mileage? Maybe you should start pulling a big ass trailer while you're at it to get even worse mileage...

[jrohner]

Get rid of the lift kit. Get rid of the big tires.

[JET]

Throw some 3.73's in it if you have 4.10's. Our Denali XL gets about 17 on the highway at 70. Normal driving is mid 15's to 16, not bad for a 325hp 6.0 than can haul 7 people in comfort. I might have to come see you about a tune Swanny, the new tranny shifts a little hard from 2-1 and more mpg is always better.

[Shane@DBPerformance]

Don't go and delete EGR also, that will make it even worse.