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Username Post: 07 Silverado 5.3 w AFM engine swap options        (Topic#351601)
Posts: 15

Reg: 07-28-10
06-17-18 04:32 AM - Post#2737235    

After many trips into the dealer about oil consumption, and doing 3 oil consumption tests (GM wasting time on my warranty), I finally gave up and just kept a quart of oil in my truck, dumping it in every 2000 mi (more highway miles when AFM would engage, meant sooner). Around 165k it started tapping and my mechanic has said that hes pretty sure my lifter is disengaging (part of AFM process) and not reengaging.

He also said that he would recommend doing the heads, but considering that my engine is burning so much oil, it wouldn't be money well spent... GM and their flawed marketing gimmick finally caused the death of my engine... GM all but laughed at me when I called the hotline. They said I should go to a dealer for diagnosis, but they made it clear I would be 100% responsible for the bill...

After a period of anger and then depression.. I now need to move forward on a pretty limited budget.

Leaning toward looking for a low mileage used engine, but was curious if the oil consumption was less common in later years? Hoping to keep the swap pretty easy - any idea how much newer I can go without making the swap more difficult than it needs to be?

Any other suggestions welcome, but trying to do this on a budget as money is tight and the truck does have some rust showing up... Otherwise I love my truck. Only other thing I'd change about it would be better fuel mileage!

Any help is greatly appreciated.
- Rob

Posts: 226

Loc: Parsippany, NJ
Reg: 10-08-02
06-17-18 12:00 PM - Post#2737276    
    In response to patientasafarmer

Google Chevy AFM delete kits. There are a bunch of kits out there. I researched a lot before buying my 2014 GMC. The last time I looked, you could get a kit that had everything you need except the ECM tune to bypass the check engine light.

Most kits come with new lifters, cam, top cover, head bolts, and associated gaskets. I think they were around $500.

That was one of the 1st I came up with on a quick Google search...Good luck & let us know how it goes.

"2nd Year" Silver Supporting Member
Posts: 133
Loc: Portland, OR
Reg: 04-16-13
06-17-18 03:16 PM - Post#2737287    
    In response to wreckmech


I have a 2015 5.3 Silverado with 30,000 miles. I have never had to add oil. I clean the intake system every 10,000 miles with the CRC GDI cleaner and have installed a catch can. I also have installed a Range device (about $200) which plugs in under the dash and disables the AFM. If you remove it , it leaves no evidence that it was installed. My catch can collects about one ounce of liquid every 1000 miles. I will remove the catch can and Range if I need any warranty work. I am hoping that this combination will give me a longer engine life than you have experienced.


Posts: 15

Reg: 07-28-10
06-17-18 06:15 PM - Post#2737305    
    In response to wreckmech

Wreckmech, thanks, I wish I did that back around 30k miles! The tapping is so loud and the oil consumption is so bad that I don't think I want to sink any time/money in it.

Dave, sounds like a great plan... I was assuming that they've dialed in the AFM technology since my 2007, which I believe was the first year... But I'm with you - the risk is not the 1 mpg hey savings reward.

Thanks again

Posts: 15

Reg: 07-28-10
07-15-18 09:48 AM - Post#2740041    
    In response to dgstarr

Looking for the cheapest option right now -

on RockAuto - $1,950 cost. "EXACT POWERTRAIN" looks like the company name...? comes with warranty... Can't find much about the comany...

Also looking at Powertrain Products reman ($3,300 cost) as they are minutes from my work, and include a warranty. Mostly good reviews. Going to stop in and talk to them Monday. Any other feedback / suggestions are welcome.

Posts: 7797
Loc: SAV
Reg: 09-26-01
07-25-18 12:31 PM - Post#2741142    
    In response to patientasafarmer

I have no feedback, but curious what did you go ahead and do?

Posts: 15

Reg: 07-28-10
09-10-18 06:08 AM - Post#2745783    
    In response to Matt

been putting this off, but need to pull the trigger. I'll post here after I do...

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