Ill Never Ever buy another gm. Thats not all bad because it saves the cost of an AFM delete kit. Very confusing stuff out there. Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. Was a disaster then but a profitable disaster. Getting 20 mpg in town and 24-28 mpg highway and love the truck now with these mild tweaks. As you said, the ECM was never seeing the AFM so I think youre good to go. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. Is this an issue only with GM SUVs and trucks, or does it include cars too? Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. Accept i only have 60K on my truck and it hasnt recovered. Should I buy one to disable the V4 mode? I am a long time GM fan but after reading how they messed up the 5.3 ( I had a fantastic 2003 Z72 off road) Ill look else ware for my next vehicle. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. 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. A 17 with 5.3. In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. It only has about 9k miles on it. Did gm make a non-dod version of the 5.3 with iron block that would work in my application? This should be added to your earlier model if you experience oil consumption. My point is that the engine likely on uses dod a small percentage of the time so can not really imagine that the delete causes any more issue than normal which may be the high oil consumption but do all of these engines with dod consume a lot of oil? Then I guess I have to spend a bunch of money and get the delete kit. Its got a hundred forty-five thousand miles on it. This video covers the steps youll need to take before upgrading to a larger [], I am installing a complete delete system, just wondering what it will do if dont plug the oil pressure relief valve? As a side note, Range Technologies recommends removing the disabler between visits to the dealer as they will need to access the OBD-2 port. I dont know where to being to look for the problem. I was told that before I start the vehicle up I will need to have the AFM and VVT disabled in the ECU but that would require a custom tune from a tuner as the ECU cannot just be told that the AFM and the VVT is gone. Would never take it on a long trip. What type of disabler did you go with? On one hand it has an aluminum block, which is nice. 1981 Cadillac V 864. it is the regulator guy! I am wondering the same thing. I know I felt the same way. I had one fail and it chattered the cam to the point that I had to Install a new cam. As GM issued 13 updatesnone of which workeddealers disabled the system on their customers' cars, leaving them permanently in V-8 mode. Is there any potential down-side to doing this in other words, might this do more harm than good? they are known to become plugged. All ready done valve job . Pod. There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? They took the engine down today found so much damage inside they ordered a new engine from Detroit. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. Replacing engine due to issues caused by AFM. Now I get 24 to 26 with deactivation locked out and full power. Excess oil will be pushed out of the pressure relief valve into the oil pan. Still have no power. It works . I may just do that Vic. Diablo says yes but they do not provide tunes. Your email address will not be published. I have a 12 wit 4.8 Silverado 75000 miles Its not GMs choice to use AFM. It is also known as Displacement on Demand (DoD) or cylinder deactivation. We need availability of a replacement engine without the AFM. . I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. Our 2013 yukon with 47k miles just failed. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. Because your Saab is mechanically similar to the Trailblazer, wed suggest that you are correct and no changes need to be made to the relief valve. If you installed a performance cam intended for a car, it may be bleeding off some low end compression. My Wifes 17 Buick with afm was my attempt to get back to gm. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Solenoids, new lifters also test voltage to solenoid pack all good their, There are so many more oil passages on engines these days. im going to plug in a dissabler when im done to keep it V8 mode all the time. Never again, except for my gen4 Z28 that has a perfect engine/trans on an otherwise rolling pc of gm crap chassis. I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. Call chevy.They should being paying most of that. Welcome to socialism folks . Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. Better airflow reduces drag on the pistons and the associated pumping losses. [] for performance, LS9 engines didnt use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. 2015 SILVERADO 1500 44 crew cab with 5.3L engine: So two weeks ago with approx 70K miles, I had an odd noise when accelerating and then engine light flashing and riding rough. I can tell you for the past 2 years I changed out my LC9 5.3L fully synthetic oil every 3,000, even though Mobile Oil claims 10,000 miles or more. On the AFM lifters that dosnt work i have installed them With the oil hole Down! Found that all passenger side cylinders are not firing. Verified over hundreds of trips, makes no sense. The collapsed lifters will not engage the pushrods and both valves remain closed. Weve written some articles on the various Vortec engine upgrade paths, such as this one on LQ4 and LQ9it discusses some of the better options for choosing a cam intended for use in a truck. Given that, would you recommend buying one of the OBD-II devices to disable AFM? bought at Brian Tooley Racing ! If you ignore it and keep driving, odds are you will destroy the cam as well. (Non-AFM engines have a smooth cover.). I have no other engine problems and Id like to fix the issue. I asked my local Chevy dealer, from whom I purchased the engine, to find out why the oil pan lacked the fitting. 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 []. Ever since that which was Feb/March 2020 i get a intermittent rattle does not do it all the time and I am not getting any codes i.e. 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. I always have done my oil changes on time, not sure about the people who owned it before me though. Question is, since my 2004 ECM and wiring harness were made before the AMF came about will this motor work properly as a V8 or will I need to replace the lifters, cam, oil sensor, etc as the delete method mentions? Fuel pump failure is the most common problem and can occur due to a number of reasons, such as a clogged filter or a faulty pump. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. Thanks. The original version sprayed oil on the cylinder walls and increased oil consumption. I have always loved Ford and Chevys , I dont like this Vehicle not one bit, starring shaft has to be lubed or it whines, front A arms has done been replaced, tapping in motor, leaf springs has been lubed, retorqued, put completely new leaf springs back in on the rear , grease all down from rims to body of truck, you have to clean often,console shakes as if milk shakes in console which later they also put rubber bushings in front of coils of shocks ( front end) .You lock it down in 44 it s metal to metal , As of now Im at 32,000 done gone threw all the arbitrator laws depending on how it goes? I recently took a long trip and it burned 1.5 quarts of oil. I recently bought a low mileage 2013 Silverado and the lifters collapsed. Its Chrysler and Ford. So I researched and got an AFM disabler. I phoned the dealer and gave the VIN number, told it isnt equipped with AFM. [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. . Now you tell me AFM works and I will tell you; that you are full of shit! the extra oil isnt needed. I just bought a 2015 5 3 17000 miles I was thinking about eliminating the 4-cylinder if I delete it with just the programmer will it hurt my motor? Why cant you stop the send signals from the computer so that the solenoids dont open and the AFM system is never engaged? Open to suggestions about best course of action. 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. I have a 2012 Chevy Avalanche. how many miles do you have on your engine? So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. You will be placed in derate if the ECM does not see the correct resistance from the ATF intake. Constant engine and transmission problems. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. Although the last oil change I had they offered a more expensive oil that would let me go every 5,000 miles and when this happened I was almost at 4,000 so needless to say I will never do that again. Pushing forward. Since it is not costing me anything out of pocket, I did not go with the Delete Kit (did not want to spend the money). If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). Hopefully he can free up the stuck/collapsed lifter. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. This valve is located on the oil pan rail and prevents excessive oil pressure from negatively impacting the AFM components. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. It has 8,000 miles on it. Its job is to direct the flow of pressurized engine oil to the active fuel management intake and exhaust valve . Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. Just pulled it down in the garage there was no other damage , luckily. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. In other words, the crankshaft and bearings were not visible. Any problems to watch out for?Did you replace the VLOM? I am trying to find out of this is true. Don't even get me started on the shortened life of the cooling, starting and charging systems. When you don't need the full power of the engine, it provides better fuel economy." Most will want to get rid of the AFM immediately. One alternative is to swap in one of the larger 6.0 non-AFM truck cams. 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. I have a shop 39 yrs . Engines withAFMalso use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan. Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. Told her that it would not last and that she needed to find a different way to get around. Install the disabler when you get your Yukon back and it will remain in good working order. An electromechanical system deactivates and reactivates all 16 of the engine's hydraulic valve lifters, controlling valve actuation. 2011 Chevy Avalanche LTZ. I also notice that it doesnt go into V4 when it is cold. Toyota has their own problems. GM switched over to the 4100 v-8 in 1982. I noticed this discussion mainly addresses Chevy Silverados and other trucks? 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. The biggest problem is nobody changes their oil on time. I just did the delete and replaced the cam as well. If you already own this engine you will need to deactivate the AFM system or even better DO NOT buy any GM vehicle with this engine. 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. I have also heard that the oil pump is to be changed and I have also heard that it does not matter. Will the plug in deactivater fix the oil consumption or will it cause more consumption? All Cylinders. Have an intake and Borla exhaust. However, they are only functional on engines that usedAFM. They should let us the better mileage. Ive heard the Brand name Range thrown around in other forums, This is how mine started outthen 6 months later on the highway the service stabilitrak light and flashing engine light came on. However I do have 7 year bumper to bumper warranty that covers this problem if I start to get lifter problems over the next 2 years.. On the other hand if get the AFM disabler installed I am pretty sure that I void the warranty from what I read on the policy. My daughters car had about 230,000 miles when she complained of the problem. This lowers the cost of building it [], [] aluminum block engine. 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. Definitely dont want to do anything to fix one problem and create another. I call it active obama fuel management .A scam . .or something similar . I have an 07 Silverado 1500 ltz. I have a 2014 Silverado with a 5-3. He unstuck it and I took it for a drive and same thing happened. I wear hearing aids, but I thought I heard more engine noises, but after checking the gas cap, the light went out for a week. Now the problems back, I have 180k miles on it now. It was good for about 10 miles and started with same loud knock noise. Since the tranny oil worked, you should now change the oil, right? Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. This basically deactivates the cylinder deactivation system. 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? please respond with your opinion. Hello. There may be an ignition related issue on that cylinder. Is there any reaction to the disabler when pulling a boat or trailer? 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. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . Is this the shield you referred to in a past post? I am leaning heavily on installing the AFM disabler. I got a 09 Chevy Ive had the 1 go out then the 7 about 2 weeks apart if I known what I know now I wouldve changed them all at once but now I have a misfire on cyl 4 but it came back in why are these lifters going out one at a time like this the 1st two that went out I was coming off the interstate an stabiltrack came on now the 4 misfired twice both times pullling out my driveway. Driver reported this occurred suddenly while driving down the highway. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). There are a few potential causes for Chevy cylinder deactivation problems, including oil consumption problems, harmful to the environment, sludge issues, and lower cylinder temperatures. The biggest difference between the Vortec engines that used to be found in Chevy and GMC vehicles and the EcoTec engines found in them now are the fueling methods. GM's Active Fuel Management (AFM) works under certain light load driving conditions to maximize fuel economy by deactivating 4 of the engines 8 cylinders. It is being covered under warranty since I only have 72,000 miles on it. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] All these comments on the 5.3 are blowing my mind!!!. I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. 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?? The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? They layed over night in engine oil before instalation. On June 4th you stated 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) I am looking at purchasing a 2012 Tahoe with the LMG per the build sheet. This new lawsuit is essentially identical to the previous. GM uses 3 different styles all are engine specific. I speak from some experience. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. This replacement engine has the same camshaft sensor plug plug, 5 wire like the AFM would use, instead of the 3 wire. I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. GM should recall every vehicle with this terrible design flaw! The only solution is to replace the entire cylinder head. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? My question is: do I install the electronic disabler on the new engine to avoid future issues? Once I get it back, could I install the Disabler safely. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. It replaces the AFM components with standard parts. Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. Below youll see references to the L99 as a result. It seems to me that the high volume oil pump should not hopefully cause premature wear but if it is pushing more oil through the heads than I guess the valve stem seals have more work to do. Then had to drive the truck back to Tampa from Cheifland Fl. I am trying to prevent same issue. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. How about if they just let us have a manual transmission agains for fuel mileage? But not sure very annoying. Whats the next step? In four-cylinder mode, they act like air springs and allow for smooth operation. Because I want to. He used seafoam and changed to synthetic oil. I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module?