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?

 

[Geotrash]

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?

In exchange for a large fee to GM for each VIN, no doubt.

 

[tom3]

Not so sure that will eliminate the lifter issues, but sure be a lot more fun at red light take offs when a tail dragging muffler-less Mustang pulls up beside you.

 

[TrueAt1stLight]

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?

I got a quote today to turn my 22’ Denali into a 650HP monster courtesy of Hennessy: for only $27,950. That does include a big list of engine upgrades besides just a supercharger.

 

[WalleyeMikeIII]

I got a quote today to turn my 22’ Denali into a 650HP monster courtesy of Hennessy: for only $27,950. That does include a big list of engine upgrades besides just a supercharger.

For that money; trade it and get the Escalade V

 

[Fast_AT4]

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

View attachment 390887

Lets see some videos and hear the beast!!!

Since the Whipple is authorized by GM to be installed, no warranty should be voided (if installed by GM also i's assume)? If that is not the case, would the add-on coverage pickup where GM dropped off?

 

[lasallen]

Not so sure that will eliminate the lifter issues, but sure be a lot more fun at red light take offs when a tail dragging muffler-less Mustang pulls up beside you.

AFM is deactivated with the tune

 

[lasallen]

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

Lets see some videos and hear the beast!!!

Since the Whipple is authorized by GM to be installed, no warranty should be voided (if installed by GM also i's assume)? If that is not the case, would the add-on coverage pickup where GM dropped off?

They are not authorized

 

[lasallen]

In exchange for a large fee to GM for each VIN, no doubt.

GM is not involved, trifecta has unlocked the global b pcm

 

[Fast_AT4]

They are not authorized

Has to be authorized in some capacity or they wouldn't be able to unlock the computer though.

 

[Geotrash]

GM is not involved, trifecta has unlocked the global b pcm

I checked their press releases and no joy. Do you have other info?