Here is Lifter (AFM) Solution on 2021+

[lasallen]

Here is your current solution to AFM with a few other benefits. 2021 Yukon AT4

 

[TrueAt1stLight]

Here is your current solution to AFM with a few other benefits. 2021 Yukon AT4

View attachment 390887

Slow down with the details! Did you have the lifters replaced with aftermarket? What about DFM: still engaging? Oh, and what’s that funny looking wheel thing: a fuel economy enhancer???

 

[lasallen]

Slow down with the details! Did you have the lifters replaced with aftermarket? What about DFM: still engaging? Oh, and what’s that funny looking wheel thing: a fuel economy enhancer???

, still original lifters. Active Fuel Management is disabled.

 

[TrueAt1stLight]

Looks like Whipple charges just under $11k including the PCM unlock. Did you have a dealer do the install? Open to sharing a ballpark of the install fees? I’m guessing this definitely voids the factory warranty but curious if Whipple offers one.

 

[lasallen]

Looks like Whipple charges just under $11k including the PCM unlock. Did you have a dealer do the install? Open to sharing a ballpark of the install fees? I’m guessing this definitely voids the factory warranty but curious if Whipple offers one.

Installed myself. Whipple does offer a 3y 36k mile warranty for $600

 

[66 Galaxie]

Nice! Please post a review of the whipple install and how you like it.

Is AFM disable standard with the whipple or did you need to request it?

 

[SSGUNNER]

Link to complete parts?

 

[GoNoGo]

Before -n- after fuel mileage ?

5.3 or 6.2 litter ?

 

[972sparky]

doesn't look like it will fit on my Duramax

 

[H1Chester]

Hennessy Motorsports recently posted on their Instagram page that they had supercharger packages for late model GM 2021+ SUVs.

Sounds like the tuning code has been cracked?