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Everything was fine for two weeks, ow customer complains s it same noise it made as before. I am wondering the same thing. It is a bad deal for sure.ive fixed a few best thing u can do is delete it in buy kit.no sense in fixing a flawed problem with the same flawed parts. The most common issue GM vehicle owners with AFM report is increased fuel consumption. This new lawsuit is essentially identical to the previous. You may want to update your post. 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. My question on a 2007 Chevy Tahoe 5.3 AFM How is that an improvement. 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? Replaced all lifters. 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. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. I read something the other day which I found to be funny. .IMHO . Dod is the biggest failure sence the 8-6-4 caddie in 1981. 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. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? Active Fuel Management About Gone From 2022 Silverado Lineup - GM Authority It will show up as a misfire code in a cylinders 1,4,6, or 7. 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??? Drives way better for my mostly paved road driving. Replace the cam or do the delete kit? 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. I also notice that it doesnt go into V4 when it is cold. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. I have a noise in the engine but it seems to go away when revved up. Ive been reading, with disgust and concern of the lifter/cam situation. GM Lifter Recall Needed, Says Class Action Lawsuit Hi Grant is that disabler still working for you ? Hi Brian, An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. The dealer in Rockhill, SC when asked only said they had not had a problem. There is no way cylinder deactivation and the resulting temperate decrease, with sudden piston heat expansion when all cylinders are engaged, can't have undo wear and tear on the rings, valves, piston and bore. I have no clue what to do now. I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. If you left the original cam in, the AFM cylinders will be down about 25 lbs. Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. 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. There are 5.3 cylinder deactivation problems that can occur. Do not pay that amount. Ive only put a straight pipe exhaust, intake, and a boost controller on it. The only problem is the extra spray on the cylinder models if a deflector isnt used and this can show up as increased oil consumption. 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? General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. Would never take it on a long trip. I loved this rtuck until this happened!! Now I get 24 to 26 with deactivation locked out and full power. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . Their tech guys have seen it all and may have some thoughts on this as well. Just shut AFM off. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. [], [] way. 4,7 plugs foul runs rough at idle. Are you saying that I am in the clear by a year and issues fixed? There may be an ignition related issue on that cylinder. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. 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??? 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 []. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. General Motors has issued a service update for 2021 model year full-size truck and SUV models that are being shipped to dealerships and may be affected by valve lifter problems. The Jury is still out on the Gen. 5s but the warranty could be an issue. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. I have a 2011 GMC Sierra 1500 with the 5.3. I just took a long trip and it used 1.5 quarts of oil. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . I recently bought a 2018 Silverado 5.3L with AFM. I would rather stay a V8 full time than deal with AFM issues in the future. It had the AFM wiring & lifter cover installed with solenoid pack in the original engine, we even removed it to inspect. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. You can monitor the oil level on your dipstick for 3,000 miles to determine if the deflector or plug would be needed, but chances are you wont based on the TSB. It was well researched and tested back in the late seventies and eighties . Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? 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. I am considering the same. I have an 07 Yukon with over 180K. Driver reported this occurred suddenly while driving down the highway. I am trying to prevent same issue. Having it fixed now, just curious Seems like a problematic design. Once I get it back, could I install the Disabler safely. Would installing the Disabler solve this? 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. We need availability of a replacement engine without the AFM. i just bought a 2018 Silverado with the 5.3 If you want to delete it entirely, its a M14 x 1.5 pipe plug or you could use the Improved Racing plug p/n IRP-814-M14-Kit. She started to have the lifter problem again after 60,000 miles more. But not sure very annoying. What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? I call it active obama fuel management .A scam . It does seem that when they start goingthey go quickly. There are so many moving components in an engine these days as opposed to the past. Just recently, GM announced a temporary closure. 5.3-liter Chevy Engine Problems: What Should You Look Out For? 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? Im curious as to how much tran fluid you put in? Are there errors or something only the dealer can clear? I couldnt agree with you less, yet I respect your opinions. One alternative is to swap in one of the larger 6.0 non-AFM truck cams. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes 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 []. what deleter (if thats a real word) have you heard good things about. The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. Is there any potential down-side to doing this in other words, might this do more harm than good? The only solution is to replace the entire cylinder head. I love the car so far. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. So I researched and got an AFM disabler. I always have done my oil changes on time, not sure about the people who owned it before me though. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. 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. 2 15 with 5.3 Sierras both with 100k and I ave noticed the point about excess oil spray. Is this due to the AFM being shut off? . .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. It has has 9000 miles and no lifter or other issues or codes so far. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. Why cant you stop the send signals from the computer so that the solenoids dont open and the AFM system is never engaged? This is what I keep telling people. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). I didnt have lifters fail, I had the 4 cylinders 1,4,6,7 have such blow by that my choice was a valve and piston job or a new motor. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. I have already dropped a lot of money on this truck (08 suburban). Thank you. Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. 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. Was thinking maybe I could trick the ruck into thinking the engine was not warmed up, however, this might cause some problems for other processes, such as mix ratio and timing. Have a lifter problem on my 2010 5.3 Silverado. Brian, http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. Once the lifter has been damaged, the cam is probably also damaged. My question is: do I install the electronic disabler on the new engine to avoid future issues? Now the problems back, I have 180k miles on it now. I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. A 14 gmc 5.3 Sierra 85000 miles 2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! I may just do that Vic. Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. . Both #6 lifters only move when turning engine by hand, if you use the starter they stop moving. Engines with AFM use a high-volume oil pump. AFM/DFM Disabler - Range Technology Did gm make a non-dod version of the 5.3 with iron block that would work in my application? The problem:. Covers me to 100K. My fear now is not will it happen but when! Im confused from the write up about the plug in. AFM Sucks!!! Change your oil. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. When you eliminate the AFM system, the extra oil is no longer needed. Fouls those plugs. It is replaceable.. just remove oil pan and it will be on top at the filter. They are taller and have special oil holes. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. If possible, will simply not using VVT provide a powerful,good running engine? With 40000 Ill Never Ever buy another gm. Open to suggestions about best course of action. It has AMF. On the AFM lifters that dosnt work i have installed them With the oil hole Down! . I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. We did take it apart to check for metal possibly being trapped inside, it looked like brand new. Glad I did. The LZ1 was upgraded with AFM and []. I bought a 2022 GMC Sierra 1500 with 5.3L, X31 off road package a year ago. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. On one hand it has an aluminum block, which is nice. Replaced all 16 lifters due to collapsed lifter on CYl #4. Thank you again for the response. I could just transfer over the AFM lifter cover, but it is really nasty on the bottom side & I do not want to risk damaging this replacement engine if it is loaded with debris from the lifter & camshaft failure. Ditto , never buy a throw away vehicle again is my recommendation and my fix . Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. Truck has an active P0300 code and runs very rough. No problems with any to this point. 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. But then she passed away from cancer. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. Correct me if Im wrong- If such an item was available couldnt you then just replace the lifters in the 4 AFM cylinders and then just run a disabler or have your ECM/PCM reprogrammed to have AFM disabled permanently. Engine starts but is throwing a misfire on cyls 4,7. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. Then it takes out the lifter again and again until you bite the bullet and replace the cam. 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 noticed this discussion mainly addresses Chevy Silverados and other trucks? If so what would the vin code be? AFMengines use special lifters for cylinders 1, 4, 6, and 7. It came back on last Wednesday starting with a flash. With the nipple, or without? hi brian when you replace the lifters do you have to change the guides also? One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. The 2016+ Tacomas are junk. Plug the tuner into your GM vehicle's OBDII diagnostic port, and follow the instructions provided to update the engine control module's program The new program will make sure that AFM never engages. I already ordered the parts to replace myself and remove the code. GM switched over to the 4100 v-8 in 1982. Still have no power. The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit do you fill to capacity anyways???? Then changed the oil. Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. Any guidance would surely be appreciated. What was happening to the first is slowly (or quickly in your case) happening to the others. Found that all passenger side cylinders are not firing. What makes you think it was a design flaw ? You were lucky that it worked. From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? GM uses 3 different styles all are engine specific. please respond with your opinion. It is also known as Displacement on Demand (DoD) or cylinder deactivation. Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. Engines withAFMalso use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan. My 2013 GMC Yukon XL 6.2L is currently having a failed lifer replaced. I guess I might have to call a dealership or GM to get a definite answer on this one. Excess oil will be pushed out of the pressure relief valve into the oil pan. GM Releases Valve Lifter Service Update For V8 Engines The older truck gets 19 mpg the newer truck with fuel management gets 14. 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). It prevents the computer from switching over to four-cylinder mode. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? We believe this confirmed that the AFM has never been operating in this vehicle. Didnt change exhaust nor tune so likely no change in power/torque. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. 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. 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 guess they also went to aluminum blocks in 2007, not sure if that has anything to do with this issues thanks for the advice! Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. There is a chance the cam lobe was stressed and started to deteriorate. I have a 12 with 4.8 Silverado 75000 miles I have 217,000+ on it and it never fails meever! Any thoughts or suggestions would be appreciated. misfire or anything. I recently took a long trip and it burned 1.5 quarts of oil. im going to plug in a dissabler when im done to keep it V8 mode all the time. 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?? Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? 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. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). Install an AFM Delete Kit According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. The car runs great apart from the shuddering at those speeds. HP tuners is not for someone like me that doesnt know how to use it and from what I read neither the range nor diablo plug and play device will work since the buicks pcm files are different than all other GM vehicles that came with afm because it was tuned in house at gms performance division. GM 6.2 Active Fuel Management Problems: What They Are and How - CarAraC In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode. The detergent. It actavated the lifter? Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. Our 2013 yukon with 47k miles just failed. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? That inherently less smooth operation requires additional NVH dampening. Put everything back together proper torque, gakets, valve seals, etc. 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 ! Disable Active Fuel Management - Ricks Free Auto Repair Advice . It's been an issue for a while but I've been getting past it by turning the key only to the off position instead of all the way back to "lock". If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. 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. Just one or two. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. The engine is running on only four cylinders. How to Deactivate AFM, DFM, MDS, and Start/Stop To Prevent - Holley 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. Yeh truck has 5237 miles on it I would appreciate it if you let me know how you make out. I did noticed the oil consumption but it was rare that I would have to add oil.

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