gm cylinder deactivation problems

If someone didnt want to spend gas buy a Toyota. Are there errors or something only the dealer can clear? Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. Do you think I can still disable AFM? Excess oil will be pushed out of the pressure relief valve into the oil pan. Thank you again for the response. Hopefully more is known by then. This is in response to pretty much everyone. Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. Thanks for the advice Brian! 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. I have the towing package on my 13 Tahoe LTZ. Because its not just GM that have engine problems. I contacted service manager in Gastonia, NC and he was kind enough to tell me the whole history of the problem.. EPA required better fuel mileage and less emissions and GM, Ford and Honda(V-6) came up with this failed AFM system. 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. I am leaning heavily on installing the AFM disabler. 1981 Cadillac V 864. I had one fail and it chattered the cam to the point that I had to Install a new cam. Having it fixed now, just curious Seems like a problematic design. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . After reading these forums Im a little concerned about my decision to stay with GM. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. 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 was getting ~ 30 mpg, so I love that. I am considering the same. What the biggest reported problem with Chevy Silverados? Hello. Only wish Id did my homework, nothing but issues, from 14,000 miles it starts this motor noise,as if lifters at cold starts, let set up for 8 hrs same noise, this noise is on the right side of engine, it lasts 5 seconds but never heard this until we had this cold spell in the state low temperatures or it was just time for this to start? What would you do if you were in my situation? Everything was fine for two weeks, ow customer complains s it same noise it made as before. Now i have my mechanic trying to follow a YouTube video I saw with a guy and a rod and a hammer. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. I have had some say that it is the valves and others say that it is the cats plugged. The collapsed lifters will not engage the pushrods and both valves remain closed. If thats the case, Summit Racing has dedicated truck cams that will increase power through the rangebottom to topbut the meat of it is in the mid-range where your engine spends the most time. There is no light on my dash or anything that indicates the system is active or exists, so its very confusing, Im still not sure if my vehicle has it or not. i just bought a 2018 Silverado with the 5.3 I phoned the dealer and gave the VIN number, told it isnt equipped with AFM. 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). 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. I will be installing the AFM deactivator tonight when I get hoe. It was good for about 10 miles and started with same loud knock noise. 2019 Chevy, GMC Trucks Get Smarter Cylinder Deactivation - Car and Driver Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. Just shut AFM off. Cylinder Deactivation & Variable Engine Displacement - LiveAbout Take a look at what bmw did in its R1250 bike. If you think GM pioneered cylinder deactivation, guess again I have also heard that the oil pump is to be changed and I have also heard that it does not matter. Covers me to 100K. Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. 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. On the AFM lifters that dosnt work i have installed them With the oil hole Down! I had to replace them all and the camshaft as well. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. Dont drive it if you have a dead cylinder due to afm failure. On one hand it has an aluminum block, which is nice. 2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! Oil flows to the special lifters through theAFMtowers. Id wait until the warranty expires then disable. Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. I noticed this discussion mainly addresses Chevy Silverados and other trucks? Hi Grant is that disabler still working for you ? Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? []. They dont so any better than domestics on mpgs. 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. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? Active Fuel Management - Wikipedia I only had 81k on the motor. Any thoughts or suggestions would be appreciated. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. Since no air can get in or out, four cylinders provide no power. Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. The trucks are only supposed to use two four. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. TheAFMcylinders are opposite of one another in the firing order. Chevrolet Silverado 2014-Present: Common Problems You also need the disabler installed in your obd connector. 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. GM claims fuel improvements ranging from 5%-15% depending on the engine. All these comments on the 5.3 are blowing my mind!!!. The lifter seems to recharge whenever the truck sits for some time. Just one. Can I (should I) also change to a standard volume oil pump? The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. Had nothing but trouble out of it. RANGE TECNOLOGY.COM. Is there any reaction to the disabler when pulling a boat or trailer? You could also have tried that if the trans oil didnt work. There may be an ignition related issue on that cylinder. Then had to drive the truck back to Tampa from Cheifland Fl. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. I just bought a 2018 Silverado. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? [], [] LS Tech: How to Delete VVT or DisableAFM []. My 2012 Silverado 5.3L just did the same thing as your Tahoe Brian. The market for nonhybrid gasoline-powered vehicles is expected to fall by 20 percent during that time, but with tech like smarter cylinder deactivationin these upcoming GM V-8 trucks, for . 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. As you said, the ECM was never seeing the AFM so I think youre good to go. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. We were getting a code that the cam position sensor was not functioning properly. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. AFMlifters have a history of failing and oil consumption can be a problem. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). This new lawsuit is essentially identical to the previous. I have an 07 Silverado 1500 ltz. My 5.3 has a vin code of O. What type of ODBII gadget did you use? Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . GM get a clue! The engine will switch to operating on fewer cylinders when cruising at a constant speed. How about if they just let us have a manual transmission agains for fuel mileage? If so what would the vin code be? Hi Brian, Next day I drove my car to work and was fine but when I left work all lights came back on and terrible noise in the hood. It had the AFM wiring & lifter cover installed with solenoid pack in the original engine, we even removed it to inspect. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. My Wifes 17 Buick with afm was my attempt to get back to gm. Had similar problems under warranty, no telling what they rigged me up with at the dealer. 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. 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. My 2013 GMC Yukon XL 6.2L is currently having a failed lifer replaced. please respond with your opinion. . This system was originally used in early 1980s Cadillacs. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. Fouls those plugs. I have a 12 with 4.8 Silverado 75000 miles I would rather stay a V8 full time than deal with AFM issues in the future. In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. If the lifter actually fails so that the mechanism wont release, it wont work. Also putting in a new transmission vs. rebuilding. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. so the trans fluid worked for you then? If you ignore it and keep driving, odds are you will destroy the cam as well. 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. Im crossing my fingers it does the trick! 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. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. 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. One the other hand, it came without AFM, VVT, or flex fuel capability. At this state, a disabler would probably do what you need it to do. According to some experts, switching to cylinder deactivation reduces the emissions high somewhere between 4 and 10%, which is a huge percentage of saving the air from pollution. No other V-8 truck of similar weight can do that (except another GM with AFM). Looking to tear down myself. I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. I pulled the head off, replaced the lifter and put the gadget in the ODBII for about $400 total. Driver reported this occurred suddenly while driving down the highway. 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. I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? Ive only put a straight pipe exhaust, intake, and a boost controller on it. Active Fuel Management About Gone From 2022 Silverado Lineup - GM Authority How long did it take? 2011 Chevy Avalanche LTZ. 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. 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. is it still working good since you have done that with the trans fluid? With 40000 The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM I guess they also went to aluminum blocks in 2007, not sure if that has anything to do with this issues thanks for the advice! The system uses solenoids to deliver oil pressure to control. Never did strand me on the side of the road way. All ready done valve job . It came back on last Wednesday starting with a flash. The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit But it also restricts passages that the oil runs through. You may want to update your post. Their tech guys have seen it all and may have some thoughts on this as well. With 44, its a enormous Jon to remove the oil pan. I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. Sylinder one lost compression on my 09 5,3. It has plenty of oil pressure and I put all new lifters in it. Only thing I noticed with the oil consumption issue. 2014 Chevy, GMC Pickups Recalled For Cylinder-Deactivation Issue With 40000 put tran fluid in oil for a day till lifter became active, had to change the fouled plug. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. All eight cylinders are now powering the engine. One alternative is to swap in one of the larger 6.0 non-AFM truck cams. I have a 2011 GMC with over 162,000 miles on it and it runs great! Or not because it is the cast iron block and not he aluminum block? You will be placed in derate if the ECM does not see the correct resistance from the ATF intake. 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. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. It uses a M14 x 1.5 thread plug like Dorman 65217. It actavated the lifter? It is also known as Displacement on Demand (DoD) or cylinder deactivation. 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. AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. Just one or two. The biggest problem is nobody changes their oil on time. 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. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . 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. Love the truck. There are no changes in the valves or the springs. Required fields are marked *. 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. Chevrolet 5.3 Engine Issues and Recommendations Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. Took the heads off again. I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. Then I guess I have to spend a bunch of money and get the delete kit. Pod. Removing ignition lock cylinder when it won't turn at all I have been assuming this is just a slow to pump-up lifter or lifters. It is currently at the dealer having a new long block installed under warranty. 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. I just took a long trip and it used 1.5 quarts of oil. Delete the AFM, buy a tuner/chip, take it to a performance place and get an actual tune done that fixes it, replace the AFM lifters with non AFM type, change other engine components with thisetc..etc..etc??? Its a CA EMMISIONS TRUCK. PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 Im a little confused on the problems too, Im reading that the 2007 pick-ups with 5.3 really had bad oil consumption and plug fouling problems, but is the 2005 5.3 that came in the trailblazers, envoys, and sabb 9-7s the exact same design as these pick-ups and prone to the same failures? I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. Found that all passenger side cylinders are not firing. Perhaps a flaw by design would be a more appropriate description . The dealer in Rockhill, SC when asked only said they had not had a problem. A 14 gmc 5.3 Sierra 85000 miles If you just crack it without it starting it moves all the time . 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. Never again, except for my gen4 Z28 that has a perfect engine/trans on an otherwise rolling pc of gm crap chassis. Below youll see references to the L99 as a result. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. Run it and let it soak overnight. She drove it for another 35,000 and it went out again. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. CHANGE YOUR OIL!!!!! The computers had not evolved enough to control the sytem. Im curious as to how much tran fluid you put in? Brian, I have been reading your article about the AFM. Why does GM's cylinder deactivation cause lifter failure? 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. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. Very confusing stuff out there. 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 ! I may just do that Vic. I would appreciate it if you let me know how you make out. lol. I cant really tell from driving. The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. 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? My fear now is not will it happen but when! The detergent. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? Took it to my dads and he tore things apart and found that I had a lifter that was stuck. Diablo says yes but they do not provide tunes. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me.