2023 Tahoe/Vibration in the 30 mph range?

[Deuce16GMCs]

2023 6.2 Tahoe here...

Does anyone experience an mild rumble in the 30-39 range when accelerating?

It seems more common when you slow down and accelerate back up.

Almost feels like the vehicle is one gear too high. High gear rumble?

Don't really feel it as much when taking off from zero, but then again, I go through 30 mph range pretty quickly then.

Seems more common at slower acceleration.

 

[greg_tahoe84]

Tire balance?

 

[B520044]

Pretty sure that's normal, unfortunately; due to DFM and transmission in too high of gear. I've noticed this with both of my 2021 Yukon's. Placing the gear selector to L9 seems to solve it, but then I lose 2 mpg minimum. I use it during city driving.

 

[Deuce16GMCs]

Pretty sure that's normal, unfortunately; due to DFM and transmission in too high of gear. I've noticed this with both of my 2021 Yukon's. Placing the gear selector to L9 seems to solve it, but then I lose 2 mpg minimum. I use it during city driving.

What's the most common speed ranges for the DFM?

It that what I'm feeling the 75-85 range?

How much of this the Brickstone tires?

 

[B520044]

What's the most common speed ranges for the DFM?

It that what I'm feeling the 75-85 range?

How much of this the Brickstone tires?

If you feel it at 75-85 then probably not DFM. At higher RPM; from my experience it runs well. I'm no expert on DFM, but when at a higher RPM I don't think DFM is activated. At the slower speeds, when you accelerate I definitely feel the "rumble you describe/high gear sensation", but not at high RPM/speed.

 

[Deuce16GMCs]

If you feel it at 75-85 then probably not DFM. At higher RPM; from my experience it runs well. I'm no expert on DFM, but when at a higher RPM I don't think DFM is activated. At the slower speeds, when you accelerate I definitely feel the "rumble you describe/high gear sensation", but not at high RPM/speed.

That's exactly what I'm feeling.

Hopefully it's just a "I'm in a higher gear than I need to be issue" and nothing serious.

 

[WalleyeMikeIII]

That's exactly what I'm feeling.

Hopefully it's just a "I'm in a higher gear than I need to be issue" and nothing serious.

I'm at 13k miles now, don't feel anything like what you describe.

 

[Deuce16GMCs]

Which Engine do you have?
I don't recall feeling any vibe or rumble on mine...I'm at around 13k miles now.

6.2L.

If take off from 0 mph and go past the 30s you don't really feel it. It's really happening more often when you slow back down to 15-25 mph and slowly accelerate back up.

It's the same feeling as when you stick in a higher gear.

 

[B-train]

I would try what @B520044 said about putting it in M9 and see if that changes it. If you accelerate more spirited from a slower speed (ie: more pedal input to deactivate DFM) does it feel the same?

 

[Deuce16GMCs]

I would try what @B520044 said about putting it in M9 and see if that changes it. If you accelerate more spirited from a slower speed (ie: more pedal input to deactivate DFM) does it feel the same?

I'll try that when I get back.

It's at the dealership now trying to find the squealing/chirping issue that just started when stopping or cruising at 15 mph.