2023 Tahoe/Vibration in the 30 mph range?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Deuce16GMCs

Full Access Member
Joined
Aug 11, 2016
Posts
200
Reaction score
109
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.
 

B520044

Full Access Member
Joined
Sep 3, 2020
Posts
328
Reaction score
233
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.
 
OP
OP
Deuce16GMCs

Deuce16GMCs

Full Access Member
Joined
Aug 11, 2016
Posts
200
Reaction score
109
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

Full Access Member
Joined
Sep 3, 2020
Posts
328
Reaction score
233
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.
 
OP
OP
Deuce16GMCs

Deuce16GMCs

Full Access Member
Joined
Aug 11, 2016
Posts
200
Reaction score
109
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.
 
OP
OP
Deuce16GMCs

Deuce16GMCs

Full Access Member
Joined
Aug 11, 2016
Posts
200
Reaction score
109
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

Full Access Member
Joined
Sep 12, 2022
Posts
1,871
Reaction score
3,045
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?
 
OP
OP
Deuce16GMCs

Deuce16GMCs

Full Access Member
Joined
Aug 11, 2016
Posts
200
Reaction score
109
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.
 

Forum statistics

Threads
128,788
Posts
1,805,448
Members
91,766
Latest member
GeorgeC
Top