Opportunity to buy a GM 5.3 without AFM

[dishdude]

Chip shortage caused GM to drop the AFM on the 5.3s. Pretty interesting stuff.

2021 Chevy Silverado, GMC Sierra fuel economy to go down due to global chip shortage - Autoblog

Chevy Silverado and GMC Sierra trucks with the 5.3-liter V8 will lose 1 mpg combined due to their cylinder deactivation systems being, well, inactive.

www.autoblog.com

 

[tyman]

Technically, it still has the AFM hardware, just electronically turned off.

 

[Quattro Pete]

2021 Silverado/Sierra 5.3L/8AT without AFM

https://www.autoblog.com/2021/03/15/gm-chip-shortage-truck-fuel-economy/ Quick, go buy one!

bobistheoilguy.com

 

[A_User55555]

In a few years were gonna see tutorials of people soldering the IC back to the PCM

 

[FordBroncoVWJeta]

 

[daves87rs]

View attachment 49803

Agreed!

 

[mrsilv04]

They can have the chip that's in my '17 back, if it would help the cause.

I know it would make me happy.

 

[Skippy722]

They can have the chip that's in my '17 back, if it would help the cause.

I know it would make me happy.

Wonder if Ram is going to go the same route…. I just use range select to disable mine, totally transforms the engine in terms of smoothness.

 

[tyman]

They can have the chip that's in my '17 back, if it would help the cause.

I know it would make me happy.

Disable it.

 

[mrsilv04]

Disable it.

Agreed. I shouldn't have to pay $200 to do it, but I'll have to.

 

[4WD]

Disable it.

AFM … or second thread on this ?

 

[tyman]

Agreed. I shouldn't have to pay $200 to do it, but I'll have to.

Or just go for it and get it tuned.

Only a few hundy more.

 

[4WD]

At 52k (PT warranty to 60k) I just plugged in a Range unit for the L83 based Tahoe. We made a road trip 75 miles each way … moderate hills and a few overpasses … So much nicer without the back and forth that’s been going on around 70 mph and wind dependent in that big box … Best $200 I spent in a while

 

[Peted]

Technically, it still has the AFM hardware, just electronically turned off.

Is this confirmed? Because that was my question.

 

[Peted]

Agreed. I shouldn't have to pay $200 to do it, but I'll have to.

In the meantime you can drive in M5 and it won't kick on the AFM, at least on my machine.

 

[AZjeff]

Is this confirmed? Because that was my question.

Unconfirmed. The language used by GM is vague whether it doesn't have the chip or all of the other mechanical stuff.

Chevy Silverado, GMC Sierra Drop Fuel Management Due To Chip Shortage

Production continues without AFM/DFM.

gmauthority.com

Chevy & GMC Will Drop AFM/DFM Fuel Saving Tech From Some Silverado & Sierra Pickups | GM-Trucks.com

Chevrolet and GMC will temporarily stop producing 5.3L engines with Active Fuel Management and Dynamic Fuel Management in the face of semi-conductor shortages

www.gm-trucks.com

 

[tyman]

Is this confirmed? Because that was my question.

Yes. It still has the hardware, just not the chip/turned on in the ECU.

 

[tyman]

Unconfirmed. The language used by GM is vague whether it doesn't have the chip or all of the other mechanical stuff.

Chevy Silverado, GMC Sierra Drop Fuel Management Due To Chip Shortage

Production continues without AFM/DFM.

gmauthority.com

Chevy & GMC Will Drop AFM/DFM Fuel Saving Tech From Some Silverado & Sierra Pickups | GM-Trucks.com

Chevrolet and GMC will temporarily stop producing 5.3L engines with Active Fuel Management and Dynamic Fuel Management in the face of semi-conductor shortages

www.gm-trucks.com

Incorrekt

Here's How GM Will Produce Engines Without Fuel Saving Features Due To Chip Shortage | GM-Trucks.com

Two weeks ago we reported that GM would stop producing some of its 5.3L engines with active fuel management(AFM) and dynamic fuel management (DFM) due to the

www.gm-trucks.com

According to GM:

• Internal components related to AFM or DFM function will be present in engines; wiring, connectors, and fuses will be present in vehicles with RPO YK9. The ECM will not be capable of activating the cylinder deactivation technology.
• When diagnosing and repairing concerns with base engine or electrical function which may be related to AFM or DFM related hardware; utilize appropriate diagnostics within SI and replace any needed components as directed by the Electronic Parts Catalog; no changes will occur to AFM or DFM related components.
• Important: Any truck designated with RPO YK9 CANNOT be reprogrammed and changed to “Turn on” the AFM/DFM functionality

 

[AZjeff]

Good to know, all of the extra parts are in there just not turning on and off. Does this make a difference for possible failure in the future? Conservative OCIs and good oil still mandatory.

 

[4WD]

Good to know, all of the extra parts are in there just not turning on and off. Does this make a difference for possible failure in the future? Conservative OCIs and good oil still mandatory.

Talked to an annuitant yesterday who has 120k on a 2016 (5.3L) 1500 4WD … has been a perfect truck.
Still suggested he put in the Range. As for the hardware … it’s heavier … but the pins that fail no longer cycle.