2017 Acadia AFM Disable - GMC Acadia Forum: AcadiaForum.net
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post #1 of 14 (permalink) Old 05-18-2017, 02:39 PM Thread Starter
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2017 Acadia AFM Disable

Does anyone know if there is a device or method to disable AFM on the 2017 Acadia?


It shudders and rumbles and sounds terrible in 4 cylinders, does not seem good for the engine. Two dealerships have both told me this has been reported by many owners and that it is 'normal'


If a shuddering engine is normal for GM.... I'm not sure how bad it would be when considered out of normal.

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post #2 of 14 (permalink) Old 05-18-2017, 02:57 PM
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That's a bunch of BS. Reach out to momtotheboys, she had the shudder, her dealer replaced the font and rear trans mounts along with the engine mounts on advice from a GM Field Engineer and it was fixed to her satifaction. But check with her for exactly what was done.

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post #3 of 14 (permalink) Old 05-18-2017, 03:08 PM Thread Starter
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Originally Posted by scbearsfan View Post
That's a bunch of BS. Reach out to momtotheboys, she had the shudder, her dealer replaced the font and rear trans mounts along with the engine mounts on advice from a GM Field Engineer and it was fixed to her satifaction. But check with her for exactly what was done.


Why would motor mounts have anything to do with this? The motor does not shake / shudder on V6 mode, only on V4 mode.

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post #4 of 14 (permalink) Old 05-18-2017, 03:23 PM
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I lost most of my old messages so I can't recheck on what she said the did on hers. Like I said reach out to her and ask her what they did.

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post #5 of 14 (permalink) Old 05-18-2017, 03:36 PM Thread Starter
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I lost most of my old messages so I can't recheck on what she said the did on hers. Like I said reach out to her and ask her what they did.

I will, thanks for the advice.


Even if GM has a fix for this, I just don't trust AFM, caused so many problems on older GM vehicles. My fuel economy got better when I disabled it on my Sierra.... go figure!

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post #6 of 14 (permalink) Old 05-18-2017, 04:16 PM
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We don't have the shudder on ours after almost 1 year, 6,500 miles. now mine is FWD with a build date of June of 2016, don't know if that makes any difference. Don't know if the earlier builds were monitored more closely if that could make a difference or not.

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post #7 of 14 (permalink) Old 05-18-2017, 05:58 PM
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Is this shudder/rumble exclusive to the AWD? I've read on here how bad it is, and have tried intently to see what is being discussed, with no luck. Now I will say I don't have a lot of mileage on this vehicle, and it is FWD, but in all honesty I wouldn't know this vehicle even had AFM, if I hadn't read that it did.

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post #8 of 14 (permalink) Old 05-18-2017, 07:33 PM
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There devices that plug into the OBDII port to disable AFM. My son has this one in his '11 Silverado.

http://www.autoanything.com/performa...disable-device

For his '11 SS Camaro we used a handheld tuner to tune out AFM.

There are options.
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post #9 of 14 (permalink) Old 05-18-2017, 08:44 PM
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Quote:
Originally Posted by Gordon Shumway View Post
Is this shudder/rumble exclusive to the AWD? I've read on here how bad it is, and have tried intently to see what is being discussed, with no luck. Now I will say I don't have a lot of mileage on this vehicle, and it is FWD, but in all honesty I wouldn't know this vehicle even had AFM, if I hadn't read that it did.
I don't think it's just AWDs some other posters said it was on their FWDs also. When I was researching the new Acadia I saw that it had AFM and was intrigued by it. We have stretches of road where we just cruise with no traffic or stops and it's fun to watch the instant mugs go to 99. I remember GM having it on older Cadillacs didn't realize they had it on some of their trucks

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post #10 of 14 (permalink) Old 05-18-2017, 09:19 PM
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Originally Posted by scbearsfan View Post
... I remember GM having it on older Cadillacs didn't realize they had it on some of their trucks
GM's active fuel management (a.k.a. displacement on demand) made it's commercial comeback with select cars and trucks in the mid part ot the last decade.

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