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Posted: 7/16/2022 11:08:20 PM EDT
[#1]
My dad bought a 2007 Tahoe with the 5.3 in 2008 (it was used with less than 10k miles). About 3 years ago the motor completely took a shit on him with around 130k on it. Rough idling, check engine light, etc. He opted to put a new motor in it rather than have the original one opened up to see if it could be salvaged. Fuck GM for that bullshit. My 2005 Yukon with the 5.3, on the other hand, just hit 243k on it yesterday with nothing more than oil changes and regular maintenance since I purchased it brand new in February '06.
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Posted: 7/16/2022 11:26:16 PM EDT
[#2]
I’ve heard the 1999-2006 5.3’s are trouble free
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Posted: 7/16/2022 11:30:52 PM EDT
[#3]
Quote HistoryQuoted: I’ve heard the 1999-2006 5.3’s are trouble free Yep, if anything that's an understatement. The GMT800 is widely known to be some of the best, most reliable vehicles that GM has ever built. |
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Posted: 7/16/2022 11:43:17 PM EDT
[#4]
Then what ?2007 and on they are shit because of the AFM?
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Posted: 7/17/2022 12:42:42 AM EDT
[#5]
Quote HistoryQuoted: Then what ?2007 and on they are shit because of the AFM? Yes. I have a AFM delete in my 08 Suburban and it runs great and has a .5 mile per gallon difference running all 8 cylinders all the time. |
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Posted: 7/17/2022 12:47:57 AM EDT
[#6]
Frequent oil changes are the key to minimizing AFM issues.
Myself, I've avoided them. I have a 2008 and a 2009, neither has AFM. LY6 and L9H motors. I would buy another brand before I bought an AFM truck. It's a flawed design, and all the BS fixes like redesigned valve covers won't fix it. The 5.3 from 2000-2006 was one of the best engines GM made, despite piston slap. I have a 2001 Suburban with the 5.3 - 310k miles, original engine and transmission. The body is rusting away, but the powertrain is good. |
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Posted: 7/17/2022 9:08:13 AM EDT
[#7]
How do you have a 2008/09 without AFM?
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Posted: 7/17/2022 9:17:24 AM EDT
[#8]
Quote HistoryQuoted: I’ve heard the 1999-2006 5.3’s are trouble free i wouldn't say that... look up the castech head issues. had to replace mine but otherwise seems all good. |
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Posted: 7/18/2022 1:21:54 AM EDT
[#9]
I work on a fleet of tahoes. We send one in for a warranty engine or cam/lifters every month or two
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Posted: 7/18/2022 4:36:14 AM EDT
[#10]
Quote HistoryQuoted: How do you have a 2008/09 without AFM? They're not 5.3 engines. LY6 - 6.0L - 2008 Chevy Suburban 2500 L9H - 6.2L - 2009 Sierra Denali You can divide 2007+ 5.3 engines into two groups: Those that have AFM issues - oil consumption, collapsed lifters, etc. Those that will have AFM issues. |
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Posted: 7/18/2022 5:12:45 AM EDT
[#11]
Quote HistoryQuoted: I work on a fleet of tahoes. We send one in for a warranty engine or cam/lifters every month or two LE fleet? They really don't seem to survive rough patrol use. Seems like you're guaranteed to break a piston, collapse a lifter or three, wipe out a cam shaft, and need a transmission before 100k. I tend to think the engine issues are due to all the damn idling they do, but nothing you can do to change that. The transmission is crap though. For the OP 2007-2011 were the worst years. I had a 2008 1500 with the L76 6.0 from the GTO. That truck had a lot of power but ate a camshaft at 66k. Those years still had the 4l60e and 4l70e in the 1500 and are easily exploded with towing. The LY6 and L96 6.0 used in the 2500+ trucks is a fantastic engine and about the only issues those have is broken exhaust manifold bolts. That's a common problem on any aluminum head V8. |
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Posted: 7/18/2022 8:53:13 AM EDT
[#12]
Quote HistoryQuoted: LE fleet? They really don't seem to survive rough patrol use. Seems like you're guaranteed to break a piston, collapse a lifter or three, wipe out a cam shaft, and need a transmission before 100k. I tend to think the engine issues are due to all the damn idling they do, but nothing you can do to change that. The transmission is crap though.
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Posted: 7/18/2022 9:38:28 PM EDT
[#13]
Quote HistoryQuoted: I work on a fleet of tahoes. We send one in for a warranty engine or cam/lifters every month or two What years? |
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Posted: 7/19/2022 4:18:10 PM EDT
[#14]
08 sierra owner here. just shy of 200 000 miles on it. it's had the lifter tick for a while and used a quart of oil between changes from the day I got it. Heck I'm surprised I didn't blow the motor. The truck was 2 years old when I got it and checking the oil in a low mileage engine isn't something I did till then.
I have all the parts to physically remove the afm system. I also got one of those range programmers and this is the first time my truck has gone from 1 oil change to the next without using any oil. |
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Posted: 7/19/2022 7:21:49 PM EDT
[#15]
My 2008 avalanche had a lifter failure @130k-140k miles lifter turned in the bore and ate the cam. I was using a tuner to have the afm disabled but the ticking had already started before I bought the truck.
New non afm Gm cam and lifters, oil pump, timing chain and rings. And it is still running, I just checked the mileage and I have 30k on it since the "rebuild" My 2011 suburban with the 5.3 has had the lifter tick for a long time. When we got it @100k on the odometer) it started burning oil like crazy so i started researching the afm issues. I put the updated valve cover on it and got the Range afm disabler on it. It has close to 400k on the odometer still goes thru oil but with all the oil leaks its hard to tell how much is running out and how much it is burning...  Both vehicles have regular oil changes I use the synthetic blended high mileage in them. And when the burban finally shoots craps That motor is getting a full rebuild from the pan up and going into the Avalanche when the time comes |
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Posted: 7/19/2022 7:48:59 PM EDT
[#16]
I have a 2015 with zero issues. I don't have a lot of miles on it though. Just a hair under 50k.
 Attached File |
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Posted: 7/21/2022 9:13:22 PM EDT
[#17]
215k with no issues, knock on wood.
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Posted: 7/23/2022 6:51:30 PM EDT
[#18]
My 2018 GMC Sierra has a 5.3 with AFM. I have the module that disables the AFM installed in the diagnostic port. Truck has 97.5k on the odometer with no issues.
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Posted: 7/23/2022 9:56:54 PM EDT
[#19]
I don’t get the hate about the AFM on these trucks. Do they fail? Yes but, 2k and you can swap out lifters and a new camshaft and have a reliable engine.
I had 272k on my 08 before I sold it for my 2020 which also has AFM and is at 67k trouble free miles.  Attached File |
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Posted: 7/24/2022 9:44:56 AM EDT
[#20]
Quote HistoryQuoted: I don't get the hate about the AFM on these trucks. Do they fail? Yes but, 2k and you can swap out lifters and a new camshaft and have a reliable engine. I had 272k on my 08 before I sold it for my 2020 which also has AFM and is at 67k trouble free miles. https://www.ar15.com/media/mediaFiles/503939/308058D6-BDF8-4EC6-AD64-44B327FB87DC_jpe-2463510.JPG |
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Posted: 7/25/2022 8:57:30 AM EDT
[#21]
Quoted: but we shouldn't have to fork over $2K to get a reliable engine...we should have got it in the initial purchase. Then buy a Toyota and spend the extra 2k at the pump over the life of the vehicle. |
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Posted: 7/28/2022 10:00:46 PM EDT
[#22]
Today I found out my dad's 2021 Tahoe had to have 16 lifters replaced. The #5 cylinder on his 5.3 had one or both lifters fail at less than 20k miles which caused rough idling, smoking, and a check engine light (I'm unclear what code/s were thrown). It was done under warranty, but holy shit did GM find a unique way to fuck up an otherwise great engine.
Edited to add: my Yukon has been amazing (we took it from DFW to Pensacola two weeks ago, crossing 243k on the way home), and my wife's '16 T4R with 66k has needed nothing outside of regular maintenance besides a PCV valve which cost me 30 minutes in my garage and $10 for an OEM replacement. I guess I'm swearing off GM trucks moving forward, sadly. |
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Posted: 7/29/2022 9:57:40 PM EDT
[#23]
Quote HistoryQuoted: What years? Quote HistoryQuoted: Quoted: I work on a fleet of tahoes. We send one in for a warranty engine or cam/lifters every month or two What years? |
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Posted: 7/30/2022 9:31:14 AM EDT
[#24]
Quote HistoryQuoted: Then buy a Toyota and spend the extra 2k at the pump over the life of the vehicle. |
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Posted: 7/30/2022 9:48:56 AM EDT
[#25]
I have a 2010 5.3 with 169k on the body. Motor replaced at 142k with deleted afm parts
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Posted: 8/14/2022 1:06:02 PM EDT
[#26]
When did GM correct the head issue?
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Posted: 8/14/2022 1:32:02 PM EDT
[#27]
Quote HistoryQuoted: but we shouldn't have to fork over $2K to get a reliable engine...we should have got it in the initial purchase. Tell us how you're not a ford owner without saying you never owned a ford  2k is nothing compared to what the sadomasochists in the blue goose egg camp spend to keep these gems going. 5.4 and 6.8 3 valves Everything ecoboost 5.0s Diesels from 03-10 and job 1 2011-12s. Sad part is. Ford gives them the 7.3 They're still fascinated with cam phaser eating over engineered far more expensive to repair boat anchors. |
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Posted: 8/16/2022 7:59:26 PM EDT
[#28]
Old topic but would a 2018 5.3 have oil consumption issues.
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Posted: 8/17/2022 11:06:36 PM EDT
[#29]
Quote HistoryQuoted: Old topic but would a 2018 5.3 have oil consumption issues. Yes eventually. 2013 Silverado 5.3 here, only have about 62k currently but I got the Range disabler probably 25k ago so far now issues. I tell everyone I meet with a 5.3 to disable it, whether it makes me sound strange or not. My good buddy had his top end rebuilt twice on his ‘07, I’m not interested in doing that. |
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Posted: 8/18/2022 3:54:49 PM EDT
[#30]
2013 Sierra Max Tow with the 5.3.
Bought in 15 with 38,000 miles. Has 185,300 today and 4996 hrs. AFM is enabled...just developed lifter tick about 7,000 miles ago and it comes and goes. The 6L80E misses first to second when cold and has does that since I bought the truck...once warm it shifts as it should. |
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Posted: 8/19/2022 8:48:58 AM EDT
[#31]
preferred method for disabling AFM?
my brother bought a 2016 1500, nice truck pretty clean. only thing I have to repair is the pass side seat detector. going to do a major service on it since no service history (trans fluids, diff and transfer case, plugs, air filter, LOF and brake flush) want to disable AFM for him so he doesn't have any trouble down the road. |
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Posted: 8/19/2022 2:30:07 PM EDT
[#32]
Range AFM Disabler is the easiest way to electronically disable it. Plugs into the OBD port, good to go. When it’s emissions time I unplug it and it’s like it wasn’t there.
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Posted: 8/19/2022 2:57:28 PM EDT
[#33]
Quote HistoryQuoted: Range AFM Disabler is the easiest way to electronically disable it. Plugs into the OBD port, good to go. When it’s emissions time I unplug it and it’s like it wasn’t there. I'll get him one of those as a gift. this truck is a big purchase for him, he's trying to grow his business and his 4cyl taco isn't getting the job done anymore. |
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Posted: 8/19/2022 7:26:50 PM EDT
[#34]
I have a 2019 K2xx 5.3 with AFM. From my research, clean oil is critical to proper operation. My plan is to short-change the OCI & keep the system as clean as I can. YMMV
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Posted: 8/20/2022 2:58:05 PM EDT
[#35]
I hit 5,000 hrs last night...still no issues.
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Posted: 9/8/2022 9:34:00 AM EDT
[#36]
When did GM correct the head issue?
The oil Consumption problems? 2011 & up 2012 & up? Thanks |
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Posted: 9/8/2022 11:02:43 AM EDT
[#37]
My 2009 GMC Sierra 1500 has 164k miles on it and I never had issues with AFM. I use Mobil-1 oil exclusively, which may or may not have any bearing on things. I am trading the truck in tomorrow for a new Ram 3500 though.
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Posted: 9/8/2022 7:06:33 PM EDT
[#38]
Quote HistoryQuoted: Old topic but would a 2018 5.3 have oil consumption issues. I have a 2018 GMC Sierra with a 5.3. I just turned 100K and just about 1900 engine hrs. I have zero oil consumption between changes. I have always used the onboard system to let me know when a change is due. Since new I have used this Range unit to turn off the AFM and it has worked flawlessly. |
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Posted: 9/8/2022 7:09:49 PM EDT
[#39]
dammit
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Posted: 9/8/2022 7:17:45 PM EDT
[#40]
Quote HistoryQuoted: I have a 2018 GMC Sierra with a 5.3. I just turned 100K and just about 1900 engine hrs. I have zero oil consumption between changes. I have always used the onboard system to let me know when a change is due. Since new I have used this Range unit to turn off the AFM and it has worked flawlessly. www.amazon.com/dp/B00BR1R8N8 Do you have battery drain issues with it? They claim you should unplug it if not driving for a couple of days due to parasitic draw. |
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Posted: 9/9/2022 8:51:58 AM EDT
[#41]
Quote HistoryQuoted: Do you have battery drain issues with it? They claim you should unplug it if not driving for a couple of days due to parasitic draw. I have had no parasitic draw issues with it, I leave it plugged in 24/7. Typically I drive to work Tues morning and the truck sits until midday Friday with no issues. |
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Posted: 9/9/2022 9:00:48 AM EDT
[#42]
The 5.3 was in my list of things to avoid when I was looking for a used truck. I ended up buying a Silverado with a 4.8 because they don't have AFM. A little less power and a lot less headache.
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Posted: 9/9/2022 9:08:30 AM EDT
[#43]
Quote HistoryQuoted: I have had no parasitic draw issues with it, I leave it plugged in 24/7. Typically I drive to work Tues morning and the truck sits until midday Friday with no issues. Good to know. I'm leaning on picking that model up. My '15 has just under 50k on it. And while no issues as of yet, I'm wanting to be proactive. |
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Posted: 9/9/2022 2:29:24 PM EDT
[#44]
I have an '09 5.3L and haven't had any issues. I did recently buy an AFM disabler for piece of mind though.
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Posted: 9/9/2022 9:07:57 PM EDT
[#45]
When did GM correct the head issue?
The oil Consumption problems? 2011 & up 2012 & up? Thanks |
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Posted: 9/9/2022 10:01:25 PM EDT
[#46]
Quote HistoryQuoted: When did GM correct the head issue? The oil Consumption problems? 2011 & up 2012 & up? Thanks They haven't. Just change your oil frequently and ignore the OLM. Like every 5k or less. |
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Posted: 9/10/2022 10:46:09 AM EDT
[#47]
Quote HistoryQuoted: They haven't. Just change your oil frequently and ignore the OLM. Like every 5k or less. Depending on how you drive, 5k-7k is a typical 100 hr change interval which is what the OLM is set for at least in the 07.5-13 trucks. Source, the OLM is what I've been following since the 2013 was new. I've never had oil consumption issues either (nor known anyone with a 2011-2013 with any). |
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Posted: 10/6/2022 8:15:12 AM EDT
[#48]
OLM?
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Posted: 10/6/2022 8:35:32 AM EDT
[#49]
Drive them in “M” and change the oil frequently
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Posted: 10/7/2022 1:22:16 PM EDT
[#50]
Quote HistoryQuoted: OLM? Oil Life Meter On a related note (since I may as well update the thread on my 2013 5.3)...just under 187,000 miles and the 6L80E decided it wanted to opt in for "early" retirement. I realistically thought between 170,000 and 200,000 miles I would be expecting this expense when I bought the truck so it comes at no surprise. The engine (I've never disabled AFM) on the other hand, still has a tick that comes and goes (just like it has for the last 150,000 miles), still gets the oil/filter changed every 100 hours, and is not showing any signs of wear or failure upon inspection of the filter media. |
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