Anyway to turn off V8/V4 "AFM"?

[wu6fiend]

My only criticism of my new 2016 Yukon Denali is the V8/V4 "Active Fuel Management" feature.

I am very aware of it transitioning back and forth, and the vehicle feels heavy and unresponsive when it is in V4 mode. I find myself accelerating harder than I would normally, just to keep it out of four cylinder mode.

I would like to disable the function altogether, while still taking advantage of the 8 speed transmission.

Another concern is somehow causing a warranty problem by disabling the function, so I'm just beginning to gather information on this subject.

I'm curious if anyone has found a way to simply turn off active fuel management? I don't care about the impact on fuel economy, neither of my two previous Yukons had this feature, and I found their fuel economy perfectly acceptable.

 

[sumo]

You can have a custom tune made for your truck. A lot of us use blackbear, myself included. It's one of the best things I ever did for her

 

[Weber Dude]

The easy way to do it drive in M7 on city and lower speed roads, then in D when you're driving on the freeway/interstate

 

[Sparky_69]

Get BlackBear tuning. My review of their tunes below.

http://www.tahoeyukonforum.com/threads/my-review-of-blackbear-tuning.83638/

 

[gat0r]

tuning or drive in manual (M7), as mentioned above

or range device (rangetechnology.com)

 

[DennisT]

The easy way to do it drive in M7 on city and lower speed roads, then in D when you're driving on the freeway/interstate

That didn't work for me. It still went into V4 mode.

 

[Weber Dude]

That didn't work for me. It still went into V4 mode.

It goes into V4 when I'm M7? When in D it will go into V4.

 

[hundhaus]

This has to be one of the only things I hate about these trucks

 

[Bigpuddie]

Get a Superchips Flashpaq f5 tuner. Good tunes and inexpensive. Will enable you to deactivate afm.

~the Captain

 

[olyelr]

What about tow haul mode, would that deactivate it? Although you would get the different shift points, too.