GM has a PI out on short duration cold start lifter tick on 5.3 and 6.0 engines
with afm. Mine seems to do it on cold starts and lasts about a minute or so.
Does anyone else have this problem? I guess there is new lifters to correct this but I was thinking I would replace mine with conventional lifters instead.
Completely different set up then the afm lifters so I'm thinking I would need different length push rods. Has anyone done this yet??

 

get used to it. unless you want it replaced..they all do it

 

whats a PI?

 

A PI is called Peliminary Information. If GM has enough issues the PI will turn
into a Bulletin.

 

gotcha...thanks...and keep us informed please

 

Been there done that. I had the same tick, and my lifters were replaced under warranty.

 

I haven't heard anything but I'll be listening now. Thanks for the info.

 

mine only did it in sub 40 degree start ups. Its not often that cold here. I just ignore it.