2023 Tahoe/Vibration in the 30 mph range?

[B520044]

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

I think the rumble likely occurs with those that drive less spirited. I drive like an old man; ease into the gas and ease out when slowing down. I think this causes the transmission to stay in a high gear longer, thus making me feel the rumble described. This way of driving may also allow the DFM to be more active, which again makes me feel that as well. Those that drive with a heavier foot likely see more shifts and less DFM activity. How is your driving habit? Curious if my theory is way off...

 

[Deuce16GMCs]

I think the rumble likely occurs with those that drive less spirited. I drive like an old man; ease into the gas and ease out when slowing down. I think this causes the transmission to stay in a high gear longer, thus making me feel the rumble described. This way of driving may also allow the DFM to be more active, which again makes me feel that as well. Those that drive with a heavier foot likely see more shifts and less DFM activity. How is your driving habit? Curious if my theory is way off...

Yes. I'm very easy on the gas pedal in the and around the city.

I may speed on the highway, but very lite in and around town.

 

[WalleyeMikeIII]

I think the rumble likely occurs with those that drive less spirited. I drive like an old man; ease into the gas and ease out when slowing down. I think this causes the transmission to stay in a high gear longer, thus making me feel the rumble described. This way of driving may also allow the DFM to be more active, which again makes me feel that as well. Those that drive with a heavier foot likely see more shifts and less DFM activity. How is your driving habit? Curious if my theory is way off...

I rarely press that throttle past about 1/3, my wife is always saying I "drive like an old man." To which I reply, "I am old!"

Net, I would not describe my driving as spirited in the least.

 

[Deuce16GMCs]

So that rumble/shutter in the 30 mph range, which is worse when cruising at 40+ and you drop below 30 and slowly speed back up, is the transmission valve body.

The dealership spent 2 mins with it and said it's a known issue and that there's already a new redesigned valve body for the 21-23 trucks.

The part is on order and takes 2-3 weeks to arrive.

Awesome. Something else wrong with this truck.

Just a heads up.

 

[WalleyeMikeIII]

I think the rumble likely occurs with those that drive less spirited. I drive like an old man; ease into the gas and ease out when slowing down. I think this causes the transmission to stay in a high gear longer, thus making me feel the rumble described. This way of driving may also allow the DFM to be more active, which again makes me feel that as well. Those that drive with a heavier foot likely see more shifts and less DFM activity. How is your driving habit? Curious if my theory is way off...

My driving style mimics yours.