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2014+ AFM (Active Fuel Management)


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Did an 800km road-trip with my new-to-me 2017 Z71 LT 4x4 with the 5.3 on Saturday. Guess I’m one of the lucky ones. AFM barely noticeable and 24MPG for the trip (I don’t have a lead foot).  

I could probably not tell when it kicked in on my hemi motor because it probably never did. The fuel mileage on that engine was amazing I could get almost 10mpg and I drove it like a granny. What wa

No, it does not. Not even close. The only Cadillacs that possibly exceeded the weight of 2014 GM crew cab 1500 4x4 pickups were the old land yachts (1976 and older) models. I believe that a 1976 Ca

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How "seamless" is your AFM?

Mine, not so much. Granted this is the first vehicle I've owned with cylinder deactivation, it just doesn't seem right to me. It's honestly like it's downshifting when it goes from V4 to V8 at a hill or gust of headwind. And V8 to V4 isn't much better. There is a very noticeable (but not huge) jerk exactly like the transmission is shifting up or down. Have not tried in manual mode yet but will next time I'm out and about.

Edited by MotoMedic
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Not noticable unless I look at the dash V4/V8 light.

 

My dads old 07 Suburban had it and that was also seamless.

 

I also had a 2010 Camaro and that was also seamless too.

 

Some win, some lose.

Edited by fondupot
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On our Tahoe (08) only knew when it kicked inbuilt watching the dash. It was seamless. Camaro had :) AFM it was seemless except for the audible noise through the exhaust.

 

 

Ryan

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Not noticable unless I look at the dash V4/V8 light

 

Same here by last vehicle had MDS (Hemi) and I did not notice it switching either but it did not have any lights or anything to indicate that it was switching between the two separate displacements.

Edited by reldridg
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