All New lifters were from AC delco. 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. I would rather stay a V8 full time than deal with AFM issues in the future. 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. stalled in a certain way a warning wouldn be a bad idea. I have a 07 Yukon with 180K and no issues what so ever. Then it takes out the lifter again and again until you bite the bullet and replace the cam. It was the first Gen. IV LS truck engine and offered Active Fuel Management (AFM). It was good for about 10 miles and started with same loud knock noise. There are no changes in the valves or the springs. I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. 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. Truck has an active P0300 code and runs very rough. 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 []. Cylinders two, three, and eight are all similar in cylinder deactivation. Thankfull for any ideeas! I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. 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. I have a 2014 Silverado with a 5-3. Looking forward to input from the forum, Thank you. Had similar problems under warranty, no telling what they rigged me up with at the dealer. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. Why cant you stop the send signals from the computer so that the solenoids dont open and the AFM system is never engaged? [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. Constant engine and transmission problems. Love the truck. 1. [], I have a 2012 Silverado Z71 bought new. Once the lifter has been damaged, the cam is probably also damaged. 1. Its Chrysler and Ford. When an engine is contstantly running on oil that is broken down, it not only wheres out components because of no protection. Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. 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. I recently bought a low mileage 2013 Silverado and the lifters collapsed. RANGE TECNOLOGY.COM. The LFA was upgraded with AFM and [], [] improvement over AFM, DFM has 17 different cylinder firing patterns and switches seamlessly between them to provide just []. I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? The motor I pulled was a 2007 LY5 with about 77k on it. 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. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . 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. 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. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. 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. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? I have a 2012 Chevy Avalanche. Replace the cam or do the delete kit? Most of the complaints show up in the 2009 to 2011 model years. 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. Any truth to that? 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . Dont drive it if you have a dead cylinder due to afm failure. Then again, it should have never been controlling those solenoids. What if I was able to trick the computer into thinking it is in 5th gear when it is actually in 6th? I have an 07 Yukon with 230k on the engine. No movement on the rocker arms. Found that all passenger side cylinders are not firing. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. Thats a tough call, if the warranty will cover itId let it run out. So now at 168 thousand miles it still runs good but gets bad gass mileage. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. No clue what to do. Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. Theyre also notorious for bad cam tower oil leaks. (Bought car 1 day before lifter died!) i just bought a 2018 Silverado with the 5.3 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. 330-630-0240. They learned that the oil level sensor was necessary and that we were supposed to have been advised that we needed to reuse the original oil pan. Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? 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 possible, will simply not using VVT provide a powerful,good running engine? any help? Deactivating cylinders at light load forces the throttle valve be opened more fully to create constant power, and allows the engine to breathe easier. 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 have successfully used a gadget that plugs into the ODBII. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. Cylinder Deactivation to the Rescue. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. also in the pan is another AFM oil filter near the external engine oil filter. 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. If you dont have VVT, you could use part number NAL-12561721 (LQ9) along with a 4-pole 3-bolt 2005 Corvette cam sprocket p/n NAL-12586481 to make it compatible with your ECM. There has been a lifter noise since I bought the truck 1 year ago. Loved the looks and interior and thought a I got a great deal at $6k even. The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM She started to have the lifter problem again after 60,000 miles more. I have a noise in the engine but it seems to go away when revved up. I plan on getting a tuner to disable the AFM. September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. Teflon coatings does not last. Now I get 24 to 26 with deactivation locked out and full power. Any help would be appreciated. They are taller and have special oil holes. 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. But then she passed away from cancer. 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? .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. Install an AFM Delete Kit Do not pay that amount. It has has 9000 miles and no lifter or other issues or codes so far. Sylinder one lost compression on my 09 5,3. The trucks are only supposed to use two four. I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. My daughters car had about 230,000 miles when she complained of the problem. Remembered that after I bought my Tahoe. Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? Not sure which direction to go from here. I would say maybe 5% of my customers keep up on their oil changes. 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. Fouls those plugs. It is replaceable.. just remove oil pan and it will be on top at the filter. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. Cant believe they havent fixed this in a decade. Would installing the Disabler solve this? I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. Open to suggestions about best course of action. The engine is running on only four cylinders. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. The engine was not Flex Fuel (E85) capable and did not use Variable Valve Timing (VVT) [], [] TheL76like its LS2 siblingis a 6.0L, Gen. 4, aluminum small block engine that was used both in GM cars and trucks.