Weird vibration

[JonnyTahoe]

I have what I thought was a Driveline Vibration called a driveline shop and the Tech said if it is RPM related it is more likely a engine vibration.

 

[68Chevysspu]

My 13 2wd Tahoe PPV is doing that too. Light acceleration, right at 1300 rpm. Approx 140,000 on it. It hasn’t gotten worse in the 6 or 7,000 I’ve put on it in the past year. I feel it in the seat and it’s always the same.

 

[4DeckSam]

If yours has Displacement on Demand then get a Range AMF delete from Holley. Had the same thing, gone after plugging in. could not stand that Frick’ng shudder

 

[rrosen]

Thanks to all. In response to questions:
- feel mostly in seat of pants
- just started recently so it's new

Since only under light acceleration, I'm guessing engine. But stumped on cause since no codes.

 

[Fless]

If yours has Displacement on Demand then get a Range AMF delete from Holley. Had the same thing, gone after plugging in. could not stand that Frick’ng shudder

^^^^ I was going to ask if it was the AFM kicking in and out.

 

[79jasper]

What year started where you could display on the dash for v4/v8 to see if dod was active? Our 11 had it.

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[4DeckSam]

I felt it upon light throttle too, but even on the freeway. You actually have light throttle then too. It was the consent in and out of V4/V8 that gives the vibrations. My display would show it going in/out. It’s like the trans was hunting for the right gear, but it was just AMF. Totally stopped after plugging in the Range.

 

[Geotrash]

No AFM on an ‘08 Denali.


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