2022 / 2023 GM V8 AFM Question

[4WD]

Had a 2019 DFM 5.3L Silverado come in just out of warranty.....Has had 3 bank 1 lifter sets & 4 bank 2 lifter sets replaced under warranty. #8 misfire with no movement of the intake rocker arm. Severely bent pushrod was found.

Recommended a used K2XX AFM 5.3L engine with a AFM delete using GM Bowtie Lifters/Non-AFM camshaft & a custom tune. Customer declined as it rivaled a new DFM engine install.

DFM will prove FAR more problematic than AFM if it hasn't already. K2XX chassis already had a sporadic history of bending pushrods on AFM cylinders.

Not sure why they had to do DFM after making progress on AFM …

 

[Rygrego]

Our 2017 L83 just hit 60k - I put a Range plug in at 52k and started 5W30 at 60k … running great …
The new L84 is downright seamless … I have an extended warranty so might not fool with it …

I've done the same about 2 years ago and couldn't be happier.

 

[dan_erickson]

GM just can’t seem to make a V8 that doesn’t fall apart inside or drink oil like water. They need to stop with the cylinder deactivation and move on to something else

 

[CKN]

The

GM just can’t seem to make a V8 that doesn’t fall apart inside or drink oil like water. They need to stop with the cylinder deactivation and move on to something else

Yea- sure.

 

[Samrsnow]

They should've just used the L96 in all the trucks/suvs. No afm, just pure reliability with a side of RMS leak and broken exhaust manifold bolts.