In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. Some drivers want V8 power under their foot at all times. I only had 81k on the motor. I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . Please report back if you have any issues, but I think you are in good shape. Nine plaintiffs filed the General . Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? I have an 07 Yukon with 230k on the engine. It is replaceable.. just remove oil pan and it will be on top at the filter. I did noticed the oil consumption but it was rare that I would have to add oil. I ran 0W-20 on more the 5000 miles between changes. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. Can they be faulty? 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 Yukon 116k it now needs its 3rd set of lifters and cam. What Is Hemi MDS? - MotorTrend AFMengines use special lifters for cylinders 1, 4, 6, and 7. AFM/DFM Disabler - Range Technology We chickened out though and just bolted the AFM solenoid plate onto the used engine. The Hit and Miss Nature of Cylinder Deactivation Systems How to Delete or Disable Active Fuel Management (AFM) On one hand it has an aluminum block, which is nice. If AFM has been deleted, its common just to use a Dorman drain plug (m14 x 1.5) to remove the pressure relief valve entirely. 2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! I have seen more internal engine failures in the last 5 years or so than I have in the first 15 years in the business. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. Now i have my mechanic trying to follow a YouTube video I saw with a guy and a rod and a hammer. I have an 07 Silverado 1500 ltz. I have already dropped a lot of money on this truck (08 suburban). Would never take it on a long trip. I have no other engine problems and Id like to fix the issue. This is in response to pretty much everyone. 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?? 8000 grand for the repair mine was 1,700.00 to repair, I had a 2004 small block v8(4.8) 331,000 miles on the truck,it was the usual on the maintenance front axles,etc. is it still working good since you have done that with the trans fluid? Yes thats true. Very confusing stuff out there. GM should recall every vehicle with this terrible design flaw! No movement on the rocker arms. I always have done my oil changes on time, not sure about the people who owned it before me though. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. The motor I pulled was a 2007 LY5 with about 77k on it. NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. While the system sounded good, the microprocessors scrambled to activate, deactivate, and then reactivate cylinders as driving conditions quickly changed, causing the car to hesitate, buck, and stall. Most will want to get rid of the AFM immediately and VVT isnt for []. Had similar problems under warranty, no telling what they rigged me up with at the dealer. I noticed this discussion mainly addresses Chevy Silverados and other trucks? So I did the job one more time. Had nothing but trouble out of it. My fear now is not will it happen but when! Because I want to. Can you tell me what needs to be done with the VVT? The lifter came apart and chewed up the lobe on the cam Im selling it I also told my friend at work when he asked me about my truck .I said Ill never by another GM ever. If you ignore it and keep driving, odds are you will destroy the cam as well. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. Thanks for your help. Did gm make a non-dod version of the 5.3 with iron block that would work in my application? 330-630-0240. 190k on the motor always ran AMSOIL full synth since new. IMHO . My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. I recently took a long trip and it burned 1.5 quarts of oil. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. But not sure very annoying. 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. I have the towing package on my 13 Tahoe LTZ. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. Why would GM ever produce such problems with such little to gain. also in the pan is another AFM oil filter near the external engine oil filter. Wed recommend a call to our partners at Summit Racing. GM switched over to the 4100 v-8 in 1982. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. It works . I quites down to nothing after running for about a minute. I recently bought a 2018 Silverado 5.3L with AFM. 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. 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. I have had some say that it is the valves and others say that it is the cats plugged. I have a 2013 1500 with the LC9. So I researched and got an AFM disabler. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? Never did strand me on the side of the road way. 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. I have 217,000+ on it and it never fails meever! I ran 0W-20 no more the 5000 miles between changes. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. 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. She had driven it for a couple of months that way. Put an S&B cold air intake on last week with huge oiled filter and it made a big improvement in throttle response and it appears possibly a slight improvement in mileage. Yeh truck has 5237 miles on it I tried the trans fluid in the oil. I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. All eight cylinders are now powering the engine. i currently get 8 mpg with the vortec 350 and a 4l60, I have a 99 Sub k1500 that i get 16 to 18 hwy loaded lightly, I get about 14 on my 95 Tahoe 2 door with 5.7 and 4l60. Corvette that does employ AFM. AFM - active fuel management strategy which deactivates the lifters on specific . The 5 Most Common Chevy EcoTec3 5.3L Engine Problems Im praying that my RangeTech buys me a few years. The early part of his automotive career included working for engine builders Scott Shafiroff and C.J. No problems with any to this point. i just bought a 2018 Silverado with the 5.3 Ditto , never buy a throw away vehicle again is my recommendation and my fix . Active Fuel Management - Wikipedia It is also known as Displacement on Demand (DoD) or cylinder deactivation. The engine is running on only four cylinders. Removing ignition lock cylinder when it won't turn at all Here are a few of the issues that you'll want to keep on your radar if you drive a 2017 Chevy or GMC vehicle with a 5.3L engine in it. Why does GM's cylinder deactivation cause lifter failure? I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. How to Delete or Disable Active Fuel Management (AFM) on GM Engines Then had to drive the truck back to Tampa from Cheifland Fl. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. Dod is the biggest failure sence the 8-6-4 caddie in 1981. Engines withAFMalso use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan. When I first bought my newer truck with fuel management, the GM tech at the dealership told me; if I wanted the engine to live a long life keep the RPMs below 4500. This is my project car and will be my drive (about 5000 miles a year). It essentially turns your V8 engine into a V4 which saves fuel. My Wifes 17 Buick with afm was my attempt to get back to gm. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . Im crossing my fingers it does the trick! My daughters car had about 230,000 miles when she complained of the problem. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. Ive only put a straight pipe exhaust, intake, and a boost controller on it. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. The system uses solenoids to deliver oil pressure to control. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. Love the truck. Where can I buy a bolt to replace this relief valve ?? One alternative is to swap in one of the larger 6.0 non-AFM truck cams. Absolutely agree, but we all know GM cant afford to recall them all & definitely wont, gettin a Toyota, but first will go to GM dealer and ask to see a truck without AFM & when they say they dont have it Ill say See ya, I have an appointment with the Toyota dealer! Always had GMs never anything else till now. Glad I did. If a shop pulled a DTC code P0300 and found AFM to be the issue, it may not be too late to try the disabler. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. You could also have tried that if the trans oil didnt work. I went with the new motor for the warranty. TheAFMsystem can be identified by its components. If you swapped in a LS9 cam, you will find it makes good power at the very top, but its actually down from 5,000 rpm and lower where the truck spends the majority of its time. There is a chance the cam lobe was stressed and started to deteriorate. 2012 5.3 Tahoe AFM, #4 lifter collapse,replaced all lifters,started engine ran ok, then rough, got #6 misfire code. If you installed a performance cam intended for a car, it may be bleeding off some low end compression. He stated if I continued to exceed 4500 RPM it would blow the lifters out. We figured we already had the intake manifold off to install the engine, why run the risk of MIL only to have to removed the intake manifold again without being paid. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. If you are using VVT, you could use the NAL-12612273 (L92) cam. GM uses 3 different styles all are engine specific. As a side note, the early ones had a 24x reluctor and plastic chain guide (good) vs. the later ones with 58x and the spring loaded tensioner (not so good). You may want to update your post. The problem:. This really sucks. 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! Should I wait until the warranty runs out, or will that be too late to stop possible damage? Are you saying that I am in the clear by a year and issues fixed? Then I guess I have to spend a bunch of money and get the delete kit. On the AFM lifters that dosnt work i have installed them With the oil hole Down! It actavated the lifter? So now at 168 thousand miles it still runs good but gets bad gass mileage. Cylinder Deactivation: What Is It and How Does It Help Save Fuel? September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. Thanks for the advice Brian! With 44, its a enormous Jon to remove the oil pan. Any advice that you could offer would be great. If I had been able to push the issue and get the time, I would have done the full fix at first without the hassle. Our 2013 yukon with 47k miles just failed. They took the engine down today found so much damage inside they ordered a new engine from Detroit. Another option is to plug it entirely if the AFM is already removed. I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. Hi. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. Its ribbed with solenoids on the underside. Brian, thank you for the quick response. I have successfully used a gadget that plugs into the ODBII. Have an intake and Borla exhaust. The valve itself is part number W0133-2574213. 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. My 2002 I had over 298K on it with no engine related issues. Looking to tear down myself. Cant believe they havent fixed this in a decade. 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. Hi my name is noel I am a mobile mechanic and I have a client that was having trouble with the lifters on a 2011 gmc yukon Denali 6.2 I placed the lifters after finishing I still had a problem with cylinder 8,6,3 rocker arms were not moving so I replaced the cam OEM part but still having miss fire on cylinder 6 what should I do to get rid of this problem, [] computer cannot switch over to four-cylinder mode. The trucks are only supposed to use two four. Im servicing a 2011 Chevrolet 5.3 with AFM. No problems with any to this point. 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. Very expensive repair too! If someone didnt want to spend gas buy a Toyota. Should I buy one to disable the V4 mode? It replaces the AFM components with standard parts. When they are locked into position, they wont wear further and cause issues down the road. Have not had a problem yet. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. Problems After AFM Delete And How to Solve Them? - Tools Bible Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. 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. Truck ran fine before that. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. Seafoam with syn oil change only fixed for a week. The computers had not evolved enough to control the sytem. Ill Never Ever buy another gm. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. 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. However, the fuel savings are not always as much as expected. Any truth to that? At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. []. 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 []. Take a look at what bmw did in its R1250 bike. Took it to a shop and they advised that it could be due to the AFM system not functioning properly. Hopefully he can free up the stuck/collapsed lifter. I dont know where to being to look for the problem. My question is: do I install the electronic disabler on the new engine to avoid future issues? Drives way better for my mostly paved road driving. 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. Install ls3 valley cover. There are 5.3 cylinder deactivation problems that can occur. Been driving with no issues but I did notice that the AFM disabler removed a P0449 code (Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction) dont know if this is a coincidence or they are related??? Then changed the oil. Yes, always change all the lifters at once. Since the tranny oil worked, you should now change the oil, right? I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. GM Making New Trucks Without Cylinder Deactivation Due To Chip - Motor1 Cylinder Deactivation (Active Fuel Management) General Motors Active Fuel Management engine control system has the ability, under certain light load driving conditions, to provide maximum fuel economy by deactivating 4 of the engines 8 cylinders. With 40000 Any thoughts or suggestions would be appreciated. Ketil, let us know what you find out. I would. , Production date on the vehicle is 04/2006 oddly enough. 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. Is there any reaction to the disabler when pulling a boat or trailer? Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. 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? Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Hi Grant is that disabler still working for you ? All New lifters were from AC delco. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . I had privilege to work on some of that garbage they never did work . 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. Don't even get me started on the shortened life of the cooling, starting and charging systems. I have a noise in the engine but it seems to go away when revved up. I also have 08 Burb, but have different symptoms (high oil consumption, blue exhaust smoke at start, and now a really rough start after sitting overnight). The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. I was looking at the 08 escalade hybrid with dod on its 6.0 so wondering if the delete would contribute to the high oil consumption and therefore would adding the deflector be a good idea. Whats the next step? will feel like a jerk asking the clerk at lowes to cut them again. Would it be fine to go ahead with the AFM Disabler? I have a 12 wit 4.8 Silverado 75000 miles The 2016+ Tacomas are junk. December 20, 2021 A GM lifter recall should allegedly be ordered for Buick, Cadillac, Chevrolet and GMC vehicles equipped with 5.3L, 6.0L or 6.2L V8 engines. Friend will send to me from Arizona. But then she passed away from cancer. I have a 2011 GMC Sierra 1500 with the 5.3. No other truck my ass .lol my 99 silverado 1500 with the junk LR4 4.8l and 320k miles 9n itgets 21mpg all day long with 93 octane gas in it. 2018 new truck has me really disgusted If I had checked this out better, there would have been one less POS Chevy sold last year ! 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. I will be installing the AFM deactivator tonight when I get hoe. As we were installing the sensors prior to installation in the vehicle, we noticed that there was no fitting on the oil pan for the oil level sensor. But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. It was good for about 10 miles and started with same loud knock noise. I am considering the same. Hi Brian, PDF GM LS AFM Deactivation Lifter Issues - Melling 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. While it does still use the GM Active Fuel Management cylinder deactivation technology that caused a plethora of issues on the gen-four Vortec 5300 engines, it seems that GM has solved the issues related to excessive oil consumption. There is a note in the TSB that states the bulletin doesnt apply to the LH6 used in the Rainier, Trailblazer, and Envoy due to a different design oil pan and AFM relief valve. Thank you for your time. a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. It could be the filter screen under the oil sending unit. My 5.3 has a vin code of O. Runs better than new now and no more oil consumpsion!! 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? Just recently, GM announced a temporary closure. You can reuse the original valley cover OR use a non-AFM valley cover, leave the harness connected, and tuck the solenoid pack away. Teflon coatings does not last. A 14 gmc 5.3 Sierra 85000 miles Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. any help? The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. I have a 2014 Silverado with a 5-3. Installed them again, all facing upwards, will know tomorrow if that was the solution.If this is the cause i cant beleve why they arnt build so that it is impossible to install them the wrong way in the plastic holder.And altso that there was no warning or installation advice With the New lifters.If these are the only lifters in the Whole world that must be in