Deactivate AFM?

[ChickenForker]

Just picked up a 2013 Denali with the beloved AFM.....I have the ability to disable it, should I? Or should I just leave it alone?

 

[mfdrookie516]

I know a lot of guys with silverado/sierras are gaining economy by disabling it. I disabled mine about 25 seconds after signing the paperwork, so I can't say whether or not it helped with mileage... but to not have it hesitate when I hammer it is nice.

 

[AZSCTACO]

Disabled mine....lost about 0.5-1 mpg but the hesitation and the drone is gone, so I'm happy

 

[08grey]

The new 2013 has afm on the 6.2. I thought the 6.2 was sans afm.

 

[TheFuzz]

AFM is present on Yukon/Escalade models, but the Sierra/Silverado do not have it.

 

[08grey]

What year did it start to come in the 6.2. Did they ever solve the oil consumption issue it creates.

 

[doubletapdrew]

2010. Not sure about oil consumption, mine doesn't burn any.

 

[felixgun]

The new 2013 has afm on the 6.2. I thought the 6.2 was sans afm.

The Denali did not get AFM until '09 and the esky got it in '10.

 

[08grey]

Afm was famous for all the 5.3 motor problems in the previous years. I can tell you that mpg is going to be a hard swallow if you are not used to stopping at the pump often.
Compare the mpg difference and make the decision, if it makes any at all.

I say toss it and tune that puppy out.

 

[mfdrookie516]

FWIW, I'm getting 21.5 mpg average on the highway with a level kit, 275/55/20 AT's running 28psi, and the Diablo tune using 93 octane... and no AFM. I lost .5 mpg when I leveled it, as I've noticed it tends to upshift more than it did before (might have something to do with not having an alignment afterwards? lazy me).