great mileage

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Originally Posted by Mang213

if I do mainly highway cruising I can get 21-22 mpg, but if its all city driving then only about 14-17. I have a heavy foot too, so I cant complain

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You have DOD on your truck? I turned mine off.

The 4.8s dont have DOD, thank God. Im not sure how much harder it is to do engine mods, but it seems like a hassle if you have DOD. You turned it off in your tune, or actually just disconnected it?

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Originally Posted by Mang213

The 4.8s dont have DOD, thank God. Im not sure how much harder it is to do engine mods, but it seems like a hassle if you have DOD. You turned it off in your tune, or actually just disconnected it?

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I wasn't aware that you had a 4.8 sorry. My 07 4.8 didn't have it either. I turned it off in the tune.

I get between 18-22 on the highway according to the formula in hptuner I have and it us pretty acurate from the last time I checked.

miles / gallons of gas = best way to tell mileage IMO

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Originally Posted by sleeper1500

...but there is more to performance then going fast in a straight line.

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And what is that??? Performance cruising? Performance braking? Performance Canadians?

Your mom knows all about Canadian Performance

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Originally Posted by pl4yboy

I wasn't aware that you had a 4.8 sorry. My 07 4.8 didn't have it either. I turned it off in the tune.

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yeah I have the lowly 4.8, but to be honest, this thing runs better than my old '03 silverado with the 5.3. Im sure its the heads, because as the rpms climb, the truck seems to WANT to go faster. The old truck had real good low end but the power wasnt as linear

Whats DOD?

displacement on demand
GMs version of cylinder disabling to save gas V8 to V4