Can you buy a 2021 silverado with the 5.3 engine without the Active fuel Management Cylinder Deactivation.

I goggle it but never found a straight answer.

 

They sell this ODB disabler for about $200 which will keep your truck in V8 mode. https://www.rangetechnology.com/prod...-dfm_disabler/
They also have Delete kits, but that's more involved as you have to change out components in the truck to completely remove AFM. https://sdparts.com/i-24048327-sdpc-...s-engines.html

I may go with the chip option once I research more and make sure no damage can occur when bypassing the AFM entirely.

 

Yes you can actually, and I feel like these are going to be highly desirable trucks. Here is a copy/paste from the tecklink page.

"Some 2021 Silverado 1500 and Sierra 1500 trucks equipped with the 5.3L V8 engine (RPO L82) 6L80 6-speed automatic transmission (RPO MYC) or the 5.3L V8 engine (RPO L84) and 8-speed automatic transmission (RPO MQE) may not have the Active Fuel Management/AFM (L82 engine) or Dynamic Fuel Management/DFM (L84 engine) feature. Beginning in March 2021, thru produced without AFM or DFM are identified with RPO YK9 – Not Equipped with Cylinder Deactivation."

 

usually on the k2 trucks just shifting to Manual 5th if its a six speed disables the v4 mode,

 

Due to the chip shortage they GM is building trucks without the AFM chip. No AFM.

If you do get one with the chip, buy a Range module.

Of course at this point in my experience with GM trucks I would recommend buying Ford or Dodge. GM is not building a good product. Plus the new body style looks like c-rap.

 

Does deactivation/modification affect vehicle warranty?

 

If you’re hoping to avoid the mechanical problems related to the AFM, you won’t. All the components (mechanical and electrical) to operate the AFM system are installed on the engine - the only difference is the PCM isn’t equipped with the chip to turn the system on and off.

So, the weak points of the system (lifters, for example) are still likely going to have failures. Time will tell for sure but I wouldn’t get too excited about it yet.

Ford and Dodge aren’t without their problems either. Both are having problems with oil consumption and/or solenoid malfunction.

Most likely, yes. I don’t think any manufacturers today allow programming modification (regardless of how it’s done) unless there’s specific application requirements (emergency and municipal vehicles for example) and usually those requirements are already programmed.

The bottom line is, we are in the middle of an emergence of untested technologies for the sake of fuel economy. You can direct your frustrations to CARB and the EPA.