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Yes. MAF and VE need tuned better. Spark needs work, too.

Got a tune to go with the log?

Excellent :)

Ok if you excuse my dumbass moment I can still offer a few suggestions.

Go back into SD and tune the VE table. Use the narrowband fuel trims to do this. Set PE enable to 85kPa.

Lower idle...

MAF looks good. Need to log MAF Hz in order to make corrections. Don't touch VE since you're MAF-only right now. It's not dangerously far off.

Yeah you're right. I copied the entire row like an idiot.

Get the VE table correct.

You didn't put in the right values for Short Pulse Adder.

Nice work. Looking forward to a log.

Idle Adapt (STIT). Short Term Idle Trim.

That's because setting SD on its own won't fix it. The tune is not squared away with incorrect injector data. I can look at the VE and see the shape and values are wrong. You have to understand...

That blows. Be sure to get an entire ACDelco or Delphi sending unit and replace the filter. Not just a pump.

What injectors are you running?

I know. Wrong engine configuration for stated goals, brand new to tuning, and wrong approach. Fortunately, there are pro's on here he can contact who would be well worth it.

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As suggested prior, properly fail the MAF to force SD and put in the correct injector data.

Here's the Deka 80 data....

Yeah a Silverado 2500 would be better. That's LQ4.

For the high IAT problem in traffic I'd have to see it. Could be related to higher BRAF than needed, for which I compensated.

I'm assuming your bucking problem happens around 1500rpm and 40mph? ...

Looks pretty decent. Can't quite tell tho since you didn't get into boost. It's always when the IAT's come up that problems surface.

Here's IAT relocated to the EVAP port like you were talking...

One thing I've had before is that combining injection timing adjustments with incorrect injector data can increase bucking and feel like a slight miss/hesitation during cruise. I've touched up VE...

Ah I see. Go ahead and keep the settings like they are now. You can adjust that ancillary fine-tuning stuff later.

Good. So that probably means the ground on the core support is questionable.
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1 - This is done to make a smoother transition between idle and base spark. If idle spark is high it makes underspeed corrections less effective.
2 - I adjusted the OL EQ ratio not PE. Can't have...

Here. I've made some changes. Log this, please. Let me know how it does.

No no. I said both ENABLED lol.

Describe the hesitation. Is it off-idle, decel, steady cruising?

Definitely verify fuel pressure. Someone had a similar problem about a year ago. They traced it down to incorrect injector wiring throwing off bank 1 and 2 assignment.