L83/86 vs L84/87 failure rates

[NWI Denali]

It seems to me like the T1 Trucks with DFM seem to have higher lifter failure rates than the K2 trucks with AFM? I know there are some dealer techs and service writers on here. Just wondering what you guys are seeing? Or am I totally off base? That's possible too  

[steelerdude15]

There was a bad batch of lifters that were installed in 2021 MY vehicles for a certain time period so maybe that is why it seems there were more failures compared to our gen.

[M1ck3y]

Well, dfm is a much more active system compared to afm. One could argue that with higher use comes greater likely hood of failure.. 

[NWI Denali]

3 hours ago, M1ck3y said:

Well, dfm is a much more active system compared to afm. One could argue that with higher use comes greater likely hood of failure.. 

Right, that's what in wondering. Still not saying afm is a great system because it obviously isn't. But GM had 15 yrs to hone it. Verses brand new DFM on the T1's