We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. Hi Grant is that disabler still working for you ? Was a disaster then but a profitable disaster. Please report back if you have any issues, but I think you are in good shape. Would installing the Disabler solve this? Loved the looks and interior and thought a I got a great deal at $6k even. All ready done valve job . I recently bought a low mileage 2013 Silverado and the lifters collapsed. Theyre also notorious for bad cam tower oil leaks. I have a 2007 Gmc Envoy Denali with LH6 cant find a good LH6 engine but I found a 2011 LC9 engine w 52000 miles will everything plug up or what am I getting into? AFMengines use special lifters for cylinders 1, 4, 6, and 7. Thanks for the advice Brian! I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. I want to put a AFM disabler in it what all do I need to have done. Its ribbed with solenoids on the underside. The valve itself is part number W0133-2574213. What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? It was good for about 10 miles and started with same loud knock noise. Im praying that my RangeTech buys me a few years. Regardless of the AFM solenoid being commanded on or off. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. I also notice that it doesnt go into V4 when it is cold. I hate it. If you are using VVT, you could use the NAL-12612273 (L92) cam. The problem I am facing is that I want to drive this vehicle for at lease another 77K and do not want to drive my vehicle with this AFM issue. I just bought a 2018 Silverado. You also need the disabler installed in your obd connector. Logic says that it should not as the ECM isnt programmed to use AFM, but will it see a lack of resistance from no solenoid pack plugged in? Did not help. Also, it is the easiest way [], [] for the 2010 Chevy Camaro SSis also a Gen IV 6.2L aluminum-block V8, but with the addition of Active Fuel Management and Variable Valve Timing. The oil pump is high volume, but there are a lot of people that dont change it and rely on the pressure valve to keep the volume manageable. Chevrolet 5.3 Engine Issues and Recommendations Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? The wife however found this deal on an Envoy Denali . Thanks. Junk . It uses a M14 x 1.5 thread plug like Dorman 65217. any help? A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. Hello. Most of the complaints show up in the 2009 to 2011 model years. Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. As the problem gets worse, youll hear a lifter tick and eventually you may see clearance between the pushrod and the rocker which will quickly destroy the cam. I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. Easier said than done. Toyota will be my next truck unless GM owns up and makes wright with consumers. Are there errors or something only the dealer can clear? I have already dropped a lot of money on this truck (08 suburban). [], [] rugged iron block 6.0L came with VVT, but without Active Fuel Management, which saves you the cost of an AFM delete [], [] The LH6 engine is a 5.3L Gen. IV aluminum engine that replaced the LM4 in 2005. We recently purchased an 08 Suburban and noticed some shuddering around crusing speeds, usually 45-55mph and highway speeds around 75mph. How about if they just let us have a manual transmission agains for fuel mileage? But if you dont like it. It has plenty of oil pressure and I put all new lifters in it. If under the truck while parked and it is doing it it sounds like it is towards the back of motor. The cost of just rings $4,000.00, [] Disable your Chevy AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] like front timing cover, knock sensor location, cylinder head style (cathedral ports), AFM (Active Fuel Management), and other components are key clues to which engine family youre looking []. The vehicles affected were 2007 to Feb. 2011 AFM equipped engines (Aluminum or Iron block-L94, LZ1, L99, LC9, LH6, L76, LFA, LMG, and LY5). This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. Well, they move a couple of times after startup thats all.Asume its the same on syl 7 on the other side.Disconected the Connector to the solenoids, no difference. Replaced all lifters on passenger side as well as pushrods for even wear. This valve is located on the oil pan rail and prevents excessive oil pressure from negatively impacting the AFM components. stalled in a certain way a warning wouldn be a bad idea. I wouldnt trade my 2000 Silverado, 5.3 liter that has constantly gotten 20 mpg since I bought it 15 years ago, for a dozen of these new $50,000 POS. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. They may be able to find some of those missing ponies. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. The engine will switch to operating on fewer cylinders when cruising at a constant speed. With the nipple, or without? Ive been a Ford guy my whole life, so I was unaware of AFM until a recent trip where I did a lot of highway driving and happened to bring up the real-time mpg display, where I saw it switch between V6 and V4. He stated if I continued to exceed 4500 RPM it would blow the lifters out. I recently took a long trip and it burned 1.5 quarts of oil. Where can I buy a bolt to replace this relief valve ?? It seems this tough engine has everything incorporated into it. Thank you. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. . From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? HELP, I have 2005 envoy that runs makes lifter noise then dies in about 30 seconds then I started it one day and it ran with little noise for 5 min started next day and it starts and dies again got heads off was told I could put ls 3 lifters in is that true or is there something else I could do thanks Duane. I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active and Dynamic Fuel Management systems from dropping cylinders. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . It is currently at the dealer having a new long block installed under warranty. $8500.00 fix. Some drivers want V8 power under their foot at all times. bought at Brian Tooley Racing ! I would rather stay a V8 full time than deal with AFM issues in the future. Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. Sometimes it will do it all the time and other times can drive it for 10 miles and then it starts but doesnt do it constantly when driving. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? Apparently all passkey III keys are not the same,, I bought one that said for 2006 impala assuming all pk3 would be the same, and I could not get it programmed in my saab 9-7,, so how Im waiting on ones that specially said for saab 9-7. hoping they will work. 50,000 miles. I have a 2008 Buick Lacrosse super that I am having a hard time finding a tuner or a tune shop that can turn off the afm. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. I am trying to find out of this is true. This really sucks. Whats the next step? Seems my oil pressure sensor is bad, are showing the same oil pressure at all times, even when it dosnt run.Dont know it that fault was there before i replaced the lifters. NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). I have an 07 Yukon with over 180K. You can reuse the original valley cover OR use a non-AFM valley cover, leave the harness connected, and tuck the solenoid pack away. There are two ways to disable or delete Active Fuel Management on your GM or Chevy Gen IV LS or LS-based Vortec engineone is to install an AFM Disabler, and the second is to install an AFM Delete Kit. I ran 0W-20 no more the 5000 miles between changes. Found that all passenger side cylinders are not firing. I have a 2007 Yukon XL with the 5.3L and am planning to do this as my lifters have failed and it rattles loudly if it starts, and runs limp. I have a 2011 Chevy Tahoe with the 5.3 Gen 4 LS (VIN Code 0) and I bought a CAM motion DOD/AFM delete kit, 3 bolt drop in CAM Motion stage 2 camshaft, VVT delete kit and finally a Diablo Predator 2 Premium for GM programmer. . [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes [] 5.3L engines start in the $600-$1,000 range and go up to a little more than $2,000 for the 6.0L and 6.2L engines. Have an intake and Borla exhaust. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? Get this, rebuild is only rings and maybe lifters. Given maximum engine power is not required during the majority of everyday driving, AFM works to deactivate engine cylinders when they are not needed, such as when cruising on the highway, thus. You can unplug the sensor on the vacuum booster and it will fool the computer into thinking there is a high demand on the engine and shut down the AFM system but you will have a Check engine light in your face for doing so . I have the towing package on my 13 Tahoe LTZ. Ditto , never buy a throw away vehicle again is my recommendation and my fix . I have a 12 with 4.8 Silverado 75000 miles Active Fuel Management (AFM) is a trademarked General Motors technology that improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. I havent has any lifter or cam issues. im going to plug in a dissabler when im done to keep it V8 mode all the time. I went with the new motor for the warranty. Yesterday my motor (116,000 miles) felt like it went into limp mode when decelerating from 8 cyl to 4 cyl but it recovered.This is the second time that this has happened in 6 months so I think that I am on the slope. I couldnt agree with you less, yet I respect your opinions. []. You mentioned that it will shoot oil into the pan and on the cylinder walls possibly causing some oil consumption So i have a running vehicle and my only concern is making it as reliable as possible, should I disable the AFM or not?? Once I get it back, could I install the Disabler safely. Does the disabler prevent the engine damage in the first place? He unstuck it and I took it for a drive and same thing happened. Its not GMs choice to use AFM. Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . Verified over hundreds of trips, makes no sense. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. This system was originally used in early 1980s Cadillacs. AFM sucks Im paying for a truck that has broke down twice replace the cam and lifters and now its broke down again 105000 miles never heard of that in a 350 Chevrolet. I would appreciate it if you let me know how you make out. has 92,000 miles and was just told I have cam and lifter failure. Getting ready to diy for $450. Thank you for your time. We were getting a code that the cam position sensor was not functioning properly. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. I cant really tell from driving. GM get a clue! We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. If I were to put a 2006 5.3L in a 2007 Avalanche and buy the unit to plug into my OBD2 port would it work? Most will want to get rid of the AFM immediately and VVT isnt for []. You cannot compare them to old 350s. My 5.3 is. Send response to tkrieg@cox.net. The most common are fuel pump failure, transfer case sensor failure, fuel injector failure, and carbon build-up. I always have done my oil changes on time, not sure about the people who owned it before me though. [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. NOTE:If you were in a situation where youve installed the AFM delete kit, but dont have access to a programmera disabler can still be a viable option. Not sure which direction to go from here. Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. I still get a P0336 code every once in a while but still good to drive around town. how many miles do you have on your engine? Do you think I can still disable AFM? There are 5.3 cylinder deactivation problems that can occur. Thankfull for any ideeas! It also has an electrical connector on the back. The result is improved combustion chamber pressure as the piston approaches top . Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. The detergent. What type of disabler did you go with? thanks brian love the info Im thinking of buying a ford now, I am going to buy a new truck in about a month it would be a Chevy but Dodge has lifter problems so they are out and Chevy has DoD problem.If they come out with Silverado without the DoD then i would buy one.But they arent so i will become a Ford man from now on, Have fun with that Ecobust motor & stretched timing chain . I have a 12 wit 4.8 Silverado 75000 miles What makes you think it was a design flaw ? Bought an 07 GMC Yukon 5.3 with the AFM, 87k. Disable the afm. Will this AFM DISABLER damage anything???. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . Dave, I also have a 2008 LTZ avalanche with 106,000 I have the exact same symptoms at this point I just want to sell it will the disabler help remove the check engine light wont pass inspection with light on thanks for your help Chris. They dont so any better than domestics on mpgs. Getting 20 mpg in town and 24-28 mpg highway and love the truck now with these mild tweaks. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . I am worrking on a 2007 chev Silverado 6.0 engine, [] the L76 that was equipped with AFM and had a ribbed valley cover, the L98 cover was []. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. So for all of you that continue to complain about how bad these things are. Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. Would you get enough power to drive at freeway speeds? I called my service station and they told me to get it in ASAP. i have a 2007 suburban 6.0 and the number 4 intake lifter took a dive.i have already started to disassemble the engine as i plan on replacing all the lifters and reassemble the engine as i never had any other problems with it. The engine has flex-fuel capability. I have a Yukon 116k it now needs its 3rd set of lifters and cam. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. Having a hard time finding one .. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. This is my project car and will be my drive (about 5000 miles a year). Accept i only have 60K on my truck and it hasnt recovered. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. yep, you are 100% Right, I called a local saab shop and they filled me in, in 2005 the trailblazer and clones have DOD (displacement on demand), My next issue is getting extra ignition keys on the cheap. I may just do that Vic. Oil 0w or 5w -20 Ive been reading, with disgust and concern of the lifter/cam situation. Yes thats true. Very confusing stuff out there. Pulled right valve cover an rockers on syl 6 dont move. Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Unplugged AFM engine only runs on 4 cylinders #2,3,5 and 8. [] they have a downside? Dont drive it if you have a dead cylinder due to afm failure. I would appreciate any feedback. Only running on drivers side cylinders. It could be the filter screen under the oil sending unit. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. There has been a lifter noise since I bought the truck 1 year ago. Love the truck so far. Teflon coatings does not last. As you said, the ECM was never seeing the AFM so I think youre good to go. Brian, I have a 2010 burb with the exact same symptoms and questions as Shawn please help! I had one fail and it chattered the cam to the point that I had to Install a new cam. NOT GOOD!! Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? Mine did at the exact same time. My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. My question is: do I install the electronic disabler on the new engine to avoid future issues? have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. There are so many moving components in an engine these days as opposed to the past. It was well researched and tested back in the late seventies and eighties . Number 7 cylinder lifters stops moving when truck starts. Cylinder deactivation works to save fuel, but it may not be for the reasons you think. Dummy Me thought gm learned its lesson in 1981 but they never did and I Too am stuck with a Buick thats just waiting to self destruct. It essentially turns your V8 engine into a V4 which saves fuel. Just one. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. It came back on last Wednesday starting with a flash. Wow, thanks for the wisdom,, i checked my VIN Code (position #8, M=LH6) and my 2005 Saab 9-7x does have the LH6 motor with iron block, Are you sure its only 2007 & newer motors? Thank you. Is the Pressure relief valve replaceable? How stupid do you have to be to whine like a welfare check cashing idiot when there are literally 3 or 4 different ways to totally disable AFM. Clean oil is crucial. Ive read at many websites that the GMCs envoys, Chevys and saabs did start to come with AFM in 2005 with the LH6 motor,It says here it started in 2006 on the saabs, then the pick-ups got AFM in 2007. If so what would the vin code be? If I had wanted a 4 banger I would have bought one. I would. The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? Brian, we have a 2007 Yukon Denali in our shop with a 6.2L v-8 that has suffered a lifter failure with camshaft damage. I am not in a position to have a new cam and lifters installed but Im also not in a position to not having a running truck! Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . From what Ive read new and low mileage engines with no issues is ideal to do a afm delete, tune, or use of a disabler. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. Will the plug in deactivater fix the oil consumption or will it cause more consumption? No problems with any to this point. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. Seems like the AFM disabler device is working for a number of people including myself as the 5.3l AFM engine has inherent design faults. Its a CA EMMISIONS TRUCK. I will be installing the AFM deactivator tonight when I get hoe. they are known to become plugged. With the AFM tuned off, it shouldnt be trying to switch over to four cylinder mode.
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