5BW Cylinder Deactivation

[OnMSRP]

I have a 2024 5BW with the 10spd and I want to remove that damn cylinder deactivation. Has anyone attempted this and if so, how?

 

[G.Newt]

You can have it tuned out. The proper way is to replace all the lifters, new camshaft, plug it, tune, etc. Around $5-$6k.

 

[Sully]

There's also devices from companies like Range. I had the OBD Range AFM/DFM Disabler for my 16' Tahoe (worked great). They finally released a DFM module for the 21'+ GM trucks/SUVs with Global B. The newer module sits in between one of the plugs going into the ECM. I just ordered this module for my 21' Suburban. It doesn't look like they're attacking many of the new GM cars yet though, just trucks/SUVs.

but the right way is as mentioned above, non-AFM lifters, non-AFM cam, new valley cover, and use a disabler or tune it out, and in some replacing the high-volume oil pump with a standard oil pump. I went the route of using a disabler on my SUV's to maintain warranty incase my lifters failed.. unplug the module, back to stock, and the dealer is non-the wiser.

 

[coffee_time]

There's also devices from companies like Range. I had the OBD Range AFM/DFM Disabler for my 16' Tahoe (worked great). They finally released a DFM module for the 21'+ GM trucks/SUVs with Global B. The newer module sits in between one of the plugs going into the ECM. I just ordered this module for my 21' Suburban. It doesn't look like they're attacking many of the new GM cars yet though, just trucks/SUVs.

but the right way is as mentioned above, non-AFM lifters, non-AFM cam, new valley cover, and use a disabler or tune it out, and in some replacing the high-volume oil pump with a standard oil pump. I went the route of using a disabler on my SUV's to maintain warranty incase my lifters failed.. unplug the module, back to stock, and the dealer is non-the wiser.

I had this device on my 2017 CTSV. Worked like a charm, and kept my warranty.

 

[hawk02]

Is the cylinder deactivation just on the 10 spd autos? I've got the manual transmission and there is no cylinder deactivation that I'm aware of.

I know the LT4 has all the hardware for cylinder deactivation but I assumed the 5-BW was like the Camaro ZL1 and it is not activated in the tune.

 

[SS_Shooter]

I had cylinder deactivation on my Escalade and could never tell the difference under any driving conditions...

 

[KatyTxCT5V]

Is the cylinder deactivation just on the 10 spd autos? I've got the manual transmission and there is no cylinder deactivation that I'm aware of.

I know the LT4 has all the hardware for cylinder deactivation but I assumed the 5-BW was like the Camaro ZL1 and it is not activated in the tune.

Correct, only active on the 10 spd autos.Yep, the hardware is in the engine regardless of transmission. I have the auto and I never feel it. I have extended warranty should it ever fail.

 

[OnMSRP]

Is the cylinder deactivation just on the 10 spd autos? I've got the manual transmission and there is no cylinder deactivation that I'm aware of.

I know the LT4 has all the hardware for cylinder deactivation but I assumed the 5-BW was like the Camaro ZL1 and it is not activated in the tune.

Sadly the EPA is requiring all new V8 engines to have cylinder deactivation.

 

[hawk02]

I had cylinder deactivation on my Escalade and could never tell the difference under any driving conditions...

It's seamless on my 2021 C8. However, I drive my Corvette 99% of the time in manual mode so it never activates. My 2021 GMC pickup truck didn't come with the chip for DFM because of the shortage when the truck was built. GM gave me a $50 credit off the price of the truck. Damn nice of them.

 

[Sully]

I could diffidently feel the DFM change in 16' Tahoe, and in my current 21' Suburban High Country. My Suburban has a Corsa on it and when I let off the accelerator and roll into a stop, when the DFM kicks back over to full 8, you can hear a pronounced "fart" burble but it diffidently makes for a weird exhaust note when decelerating and as constant speed. I should have the new module from Range on Friday.

 

[FLYARMY]

What is the "advantage" of deactivating ? I don't even notice anything occurring. If the green light indicator didn't pop up , I wouldn't know the difference.

 

[Sully]

What is the "advantage" of deactivating ? I don't even notice anything occurring. If the green light indicator didn't pop up , I wouldn't know the difference.

Gives a good breakdown... in summary though, advantages are full time V8 (no surging, e.g when DFM flips back and forth especially with rapid acceleration), throttle response, limit/prevent lifter failure (lifter failure can still occur even when disabled via software so full AFM/DFM delete is the only true way to remove the headache, or potential headache), and in some limit oil consumption... I can only speak to GM SUVs 5.3 and 6.2, so not sure how its feels in a car.

 

[KatyTxCT5V]

My 2021 GMC pickup truck didn't come with the chip for DFM because of the shortage when the truck was built. GM gave me a $50 credit off the price of the truck. Damn nice of them.

My 2022 GMC was the same way, no chip. Explains the real cost of the chip for $50 credit

 

[coffee_time]

Sadly the EPA is requiring all new V8 engines to have cylinder deactivation.

Do you mean post 2024? Because the manual 2024s don't have it. I don't know about the 2025s.

 

[OnMSRP]

Do you mean post 2024? Because the manual 2024s don't have it. I don't know about the 2025s.

I think the EPA is requiring it from model year 2026 or 2027, they just want manufactures to reduce emissions on V8 Engines. GM is going the cylinder deactivation approach.

 

[OnMSRP]

There's also devices from companies like Range. I had the OBD Range AFM/DFM Disabler for my 16' Tahoe (worked great). They finally released a DFM module for the 21'+ GM trucks/SUVs with Global B. The newer module sits in between one of the plugs going into the ECM. I just ordered this module for my 21' Suburban. It doesn't look like they're attacking many of the new GM cars yet though, just trucks/SUVs.

but the right way is as mentioned above, non-AFM lifters, non-AFM cam, new valley cover, and use a disabler or tune it out, and in some replacing the high-volume oil pump with a standard oil pump. I went the route of using a disabler on my SUV's to maintain warranty incase my lifters failed.. unplug the module, back to stock, and the dealer is non-the wiser.

I’m probably gonna buy one of those, all they have is for the gen 3 CTS-V right now. But im sure they’ll make one for the BW sooner or later.

 

[Sully]

Installed the Range DFM today in my 21’ Suburban 6.2L. Big difference in general idle when off the accelerator. No more surging or fart burbles when rolling to a stop. Nicely built.