How many of you DO NOT experience buffetting and vibration problem?

[68 Grand]

Stock 2015i Tahoe LTZ 4WD, March 2015 build, with trailering package and 20 inch chromes. 11k miles and never had a thing resembling this.

Also briefly drove a rental 2016 Suburban with the same specs. No sign of this.

 

[Flynnstone]

I have a '15i Yukon SLE and had buffeting And vibrations when I bought it new. After replacing all the tires and road force balancing the problem went away.

I've since put 24" wheels on, and some minor vibrations and buffeting have come back. It's not bad enough to bother me, however I have had the new wheels road force balanced by discount tire and that certainly improved the condition. I'm pretty sure if I took it to a wheel specialist and had them road forced again/properly the buffeting/vibrations would disappear.

 

[Shadow17]

I do apologize but.. What is dod cam and AFM??


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No problem. I am just very familiar with it coming out of a G8GT.
It is Active Fuel Management and Displacement on Demand. It is what causes the engine to cut out into 4 cylinder mode to save fuel costs.
In a Pontiac G8 with any serious engine mods, it was annoying as heck. One of the first mods recommended in the G8 forum was a tune to remove the AFM and keep it in 8 cylinder mode at all times.
Fuel mileage suffered. But the annoying vibration was gone.

 

[beepster]

Subscribed.

 

[cardude2000]

No problem. I am just very familiar with it coming out of a G8GT.
It is Active Fuel Management and Displacement on Demand. It is what causes the engine to cut out into 4 cylinder mode to save fuel costs.
In a Pontiac G8 with any serious engine mods, it was annoying as heck. One of the first mods recommended in the G8 forum was a tune to remove the AFM and keep it in 8 cylinder mode at all times.
Fuel mileage suffered. But the annoying vibration was gone.

How badly did mpg suffer?


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[Shadow17]

I didn't drive my G8 much. Only 20K miles in 6 years.
I bought a module to eliminate AFM in my Yukon. I have only driven in town since plugging it in; no highway trips yet. I'm averaging 14-15 mpg on mostly 5-20 mile trips.

 

[gat0r]

no issue

early model 2015 burb ltz 4x4
MRC
towing pkg
aftermarket wheels
AFM disabled
sunroof
roof crossbars

 

[cardude2000]

no issue

early model 2015 burb ltz 4x4
MRC
towing pkg
aftermarket wheels
AFM disabled
sunroof
roof crossbars

Why did you disable AFM? And what was the mpg hit? Thanks


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[Cha0s13]

I have Afm disabled on my Tahoe with a Range technology. I got sick of the horrible drone when v4 kicked in. I have not noticed any mileage change which is awesome. Drove to Orlando this weekend and got 24.2 Mpg.

 

[sickk23]

I have Afm disabled on my Tahoe with a Range technology. I got sick of the horrible drone when v4 kicked in. I have not noticed any mileage change which is awesome. Drove to Orlando this weekend and got 24.2 Mpg.

Interesting, thanks for the feedback! What is a range technology? And where can I get one lol


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