07 Yukon/Active fuel management

[Posiburner]

Is there a way to shut off the active fuel management feature on my 07 Yukon?

 

[Geotrash]

Is there a way to shut off the active fuel management feature on my 07 Yukon?

There are lots of posts here on this. Yes. You can do it with a "Range" device that connects to the OBDII port. You can have it permanently tuned out for $50 by sending your ECU into a company that does it, you can have it tuned out as part of a professional performance email tune by Black Bear Performance, or you can mechanically delete it by doing a cam and lifter swap and then having it tuned to not use the AFM components because they're no longer there.

 

[woodsie]

There are lots of posts here on this. Yes. You can do it with a "Range" device that connects to the OBDII port. You can have it permanently tuned out for $50 by sending your ECU into a company that does it, you can have it tuned out as part of a professional performance email tune by Black Bear Performance, or you can mechanically delete it by doing a cam and lifter swap and then having it tuned to not use the AFM components because they're no longer there.

What is the purpose of the AFS?

 

[Geotrash]

What is the purpose of the AFS?

AFM? Ostensibly, to save fuel and meet federal CAFE standards.

 

[woodsie]

What benefit is it to disconnect it? Saw this discussion on here. I have an 05 Tahoe that sucks on gas mileage. Didn't know if it would help me. Thanks for your response, Geotrash.

 

[Geotrash]

What benefit is it to disconnect it? Saw this discussion on here. I have an 05 Tahoe that sucks on gas mileage. Didn't know if it would help me. Thanks for your response, Geotrash.

It's a common failure point. Something in the system fails at some point in its millions of transitions and a lifter gets stuck in the collapsed position. Left long enough it will hammer and eventually wipe the cam. At most it's good for .5-1 mpg but I actually get better mileage without it and with a black bear tune.

 

[Crabby]

I was in contact with Range about two weeks ago and they are working on a device for 22-23 but nothing yet.

 

[Posiburner]

 

[Posiburner]

I ordered this for now.See how it goes

 

[OklabyGodhoma]

I’ve been dealing with this AFM-DOD crap for several years now. Screw it!! I just had all the parts delivered yesterday from Texas Speed. Almost $900.00 for the parts but they are quality including a new cam and I am so looking forward to getting everything installed. Looking at dropping over $2K for the labor but it’s worth it. My Yukon is an ‘07 with less than 140,000 total miles.