AFM....How long have you ran your Avalanche with it?

[Phantomlution]

YEs... but with AFM... the damage is severe and a programmer to turn off is so cheap relative to a new motor...

and what real benefit do you get from AFM... maybe 1 mpg better on highway?
Doubt it helps much in City...

Did they not learn about this back when they called it DOD DIsplacement on Demand.... was garbage then too.

Issue is the lifter is powered by engine oil which is fine when clean but it gets dirty. pressure changes, Lifter gets sticky...
Just something I would take care of first if I had that in my truck.

Just read to yesterday day a member tearing apart his engine since it started to run bad and then give misfires and all sorts of grief.

the dreaded PO307 and stabilitrak issues on my 2008 | Chevy Avalanche Fan Club of North America


Another I just read now:
I have white exhaust smoke | Chevy Avalanche Fan Club of North America

I dunno... AFM scares me a lot since it is a design thing.... and nothing you can do but delete it.

I can’t remember where I read the information but what I do remember is after several years and test they’ve proven it would take over 300k in mileage for AFM to actually be of any benefit. GM quit doing AFM in 2018 I think or around there once the studies started showing up.