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2014+ AFM (Active Fuel Management)

Ron.s

By Ron.s
in Engines & Drivetrain

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oldmann
oldmann

Why are people so concerned about this topic. I do not understand it. Just drive it. End of story. And yes, even if you can't figure out why the truck has it, it is to save fuel.

pm26
pm26

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

seamonster
seamonster

Whats up with the name calling?   Cant you see we agree----the AFM feels like a gear shift!   Many people want 6 and 8 speed tranny and then complain they can feel AFM. That is what I dont unders

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AW22 Enthusiast

AW22

Posted
Posted

http://www.rangetechnology.com/pages/v8

 

Have had my Range Technology AFM installed for 1500 trouble free miles. No more V4 in my 6.2 liter V8

It takes all of 5seconds to plug in under the driver side dash in the OBD port. I did not spend 52k on a 1/2 ton truck, to have half the cylinders working. I averaged 17mpg on 6hr (hilly) drive to upstate NY, with my cruise control on for maybe half the time, and speeds ranging anywhere from 74-85mph. Probably would have 19-20mpg if I slowed down to 65-70. Well worth the $179 spent. Not detectable and easily unplugged in seconds if ever getting dealer servicing. I will get a tune one day but only have 2300miles on the truck and want to wait till something around 8-10k before going down that road. Likely will use BlackBear when I do it based on what I've read on this forum.

tbarn Senior Enthusiast

tbarn

Posted
Posted (edited)

Have worked in dealers for 31 years. Never have checked for a "tune". Although it is always a possibility. Diesel is a different story though.

Edited by tbarn
Axel114 Enthusiast

Axel114

Posted
Posted

Man I'm just curious but what are you going to do if you ever have any warranty issues come up? I would love to add a exhaust and a custom tune to mine as well that disables the afm all together but am afraid that as soon as I do something major will crap out on me.

Come on in, the water is fine. I have a Black Bear custom tune. Best money you will ever spend on your truck. Justin keeps a copy of your stock tune and you load it back on any time you want, like if you needed warranty work.

66nova Senior Enthusiast

66nova

Posted
Posted

I don't have a 2014, but for all you guys on the fence. I have a 2007 GMT900 that has been Black Bear tuned and AFM delete since 2008. 75,000 miles and it runs great still.

GM MAN VINCE Enthusiast

GM MAN VINCE

Posted
Posted

 

Man I'm just curious but what are you going to do if you ever have any warranty issues come up? I would love to add a exhaust and a custom tune to mine as well that disables the afm all together but am afraid that as soon as I do something major will crap out on me.

 

 

Come on in, the water is fine. I have a Black Bear custom tune. Best money you will ever spend on your truck. Justin keeps a copy of your stock tune and you load it back on any time you want, like if you needed warranty work.

 

I didn't think black bear had anything out yet for the 14s? How exactly does the black bear tune work do I just call them and tell them I want a tune for my truck and they send me one?

 

How much is a tune from black bear?

Axel114 Enthusiast

Axel114

Posted
Posted

If you go on their web site(you can find a link on this site) you find a list of where the next meet is going to be, sign up and meet Justin in person for a tune. Or you can buy an auto-cal. You plug it in to your truck and drive with it and record data, send the data to Justin and will e-mail you a tune to log in to your truck. You can e-mail him or post a thread on this site and he will help you out.

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LTZTom Enthusiast

LTZTom

Posted
Posted (edited)
If i'm not paying attention, I would never know it switched. If I anticipating it going to V8 to V4, I will notice a slight engagement.

 

Same for me.

Me too. I have a true dual Flowmaster exhaust system on mine and unless I'm paying attention I hardly notice when it changes.

 

 

Tapatalk via iPhone 5s

Edited by LTZTom
iCryWheniGoPoop Enthusiast

iCryWheniGoPoop

Posted
Posted

If convertor is locked up properly, then you won't experience a loss or gain in rpm's.... Maybe bobble at the transition but RPMs should remain the same if speed is constant.

Nofastcar Enthusiast

Nofastcar

Posted
Posted

I have a 2014 sierra 1500 4.3L with the standard. It's my understanding that all the new engines drop cylinder via the AFM. Question is, with the standard DIC I can't find an indicator light to show when it's in V4 mode. Is this light only on the upgraded DIC's?

TJay74 Senior Enthusiast

TJay74

Posted
Posted

I don't think it shows unless you have the LED DIC. It is in both of the fuel mileage screens where it shows you going from V8 to V4.

fondupot Senior Enthusiast

fondupot

Posted
Posted

I know on the upper trim levels on the "instant MPG/mpg for the last 25/50/400 miles" screen it shows going from V8 (in red) to V4 (in green) in the bottom right corner. It also shows that v8 to v4 on the "trip/average mpg" screen.

 

Lower trim levels, might not have a screen that shows it.

Audioi Enthusiast

Audioi

Posted
Posted

I'm curious to know whether it needs to be in third gear, fourth gear, 200° or whatever to slip into V4 mode.

Hootbro Enthusiast

Hootbro

Posted
Posted

I got the 1WT and 4.3 V6 also. It does not show when it is in V4 mode on these base clusters.

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