AFM Delete and extended warranty

[Bleepster]

I have a 2011 Silverado LT with 74k on the dial.  bought it 6 months ago.  I do not experience oil consumption between changes.  Been reading about the AFM delete.  I have an extended warranty that covers all lubricated engine components for another 20k miles.

 

with said warranty, should I worry about the AFM delete chip or leave well enough alone until warranty get close to expiring?

[Grumpy Bear]

Well Brian: The truck is 8 years old. Has been driven just over 9K a year. Is trouble free. Has been trouble free. So the first question is asking; should I fix a problem it is not having based on what I've read in a/this forum.  The second question is will this issue, some small percentage of trucks experience, likely to happen in the next 20,000 miles? 

 

Let me try this again. You've read on a forum where the majority of reports about the system are negative. No one complains when it works flawlessly for it's entire life...right? So based on this:

 

Your asking if people of an obviously bias statistical sampling;  if one of these people would be willing to offer an opinion on the likelihood that it will be an issue between 74,000 miles and 94,000 miles. 

 

Do you really want to base you future actions on a guess from a pool of bias observers?  

 

How about this. Knowing, (you said you did your research, right)...that lifter collapse in the majority of cases is a low oil pressure issue "at the time of AFM switching" which can be caused by two things; 1.) low oil pressure indicated by low hot idle oil pressure or by some restriction commonly found before the lifters and is often the result of the VLOM supply screen plugging due to less than perfect oil regiment, contamination or quality of lubrication or overly abusive oil environment. I would suggest a fully warmed up check of your hot idle oil pressure with a Scan Tool. The dash gauge is useless. 20-25 psi is normal. Trouble, according to the factory bulletin starts at 19 psi. 2.) Then one might have a look at the VLOM oil supply screen, replace it if needed....Why? To 'gauge the quality of maintenance' it received for the first 74,000K miles. Getting 'eyes' on it removes the crystal ball approach, don't you think? 

 

It's future then depends largely on your future actions then, correct? Moving your query from the unknowable to the 'I got a pretty good idea' arena. All that said a purely materials related failure can happen to any truck at any time. That is forever unknowable. But...considering the number of miles on this truck I'd feel pretty good that fit/finish and basic materials have proved themselves.

 

 

 

You asked for an opinion. There's one. 

[Bleepster]

Appreciate your input and comments.  food for thought.

 

thanks

[Grumpy Bear]

Thank you for your patients. Your welcome. 

[KARNUT]

One thing you could check. On the newer trucks you could put your transmission in m and the click to next to last highest gear. That would allow your truck to shift the gears except the last one without engaging cylinder deactivation. Then if your going to go past 2K on the RPM you click up to the last gear usually around 70 MPH. It doesn't hurt to cruise at a higher Rpm, but gas mileage would go down. I did that with mine mostly because I had louder than stock exhaust, the v-4 was annoying. Some claim exercising the cylinder deactivation less makes it last longer.


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