I have an 07 Silverado 1500 ltz. Toyota will be my next truck unless GM owns up and makes wright with consumers. I have a 2011 GMC Sierra 1500 with the 5.3. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? 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. No it runs fine on sylinder one but not on 6 or 7!!! CHANGE YOUR OIL!!!!! You will be placed in derate if the ECM does not see the correct resistance from the ATF intake. The engine will switch to operating on fewer cylinders when cruising at a constant speed. I am having that done today on my 08 Suburban and its only costing me $225. 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. Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . 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. Had similar problems under warranty, no telling what they rigged me up with at the dealer. Have an intake and Borla exhaust. Is this the shield you referred to in a past post? 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. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). 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. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . [] For more information on AFM, including a comprehensive guide on how to completely remove it from your engine, check out this article. I have ordered an ATM disabler and will be putting a can of Textron in the gas at the next fill up. Is there any potential down-side to doing this in other words, might this do more harm than good? Once I get it back, could I install the Disabler safely. It also has an electrical connector on the back. The Hit and Miss Nature of Cylinder Deactivation Systems Active Fuel Management - Wikipedia 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 . 1. I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. Any thoughts or suggestions would be appreciated. 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. Accept i only have 60K on my truck and it hasnt recovered. []. Didnt change exhaust nor tune so likely no change in power/torque. I recently bought a 2018 Silverado 5.3L with AFM. AFM - active fuel management strategy which deactivates the lifters on specific . Have not had a problem yet. I am leaning heavily on installing the AFM disabler. Took it to a shop and they advised that it could be due to the AFM system not functioning properly. There is a chance the cam lobe was stressed and started to deteriorate. . Help appreciated. I just took a long trip and it used 1.5 quarts of oil. Took it to my dads and he tore things apart and found that I had a lifter that was stuck. Ill Never Ever buy another gm. PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. My ignition lock cylinder is completely stuck in lock position with the steering wheel locked as well. Truck has an active P0300 code and runs very rough. Traded it with 180K miles and did not experience any problems. Definitely dont want to do anything to fix one problem and create another. 330-630-0240. She had driven it for a couple of months that way. Can you tell me what needs to be done with the VVT? Glad I did. Any guidance would surely be appreciated. Hello. in your opinion will this work, i really dont see any reason it wouldnt. I have a 2013 1500 with the LC9. 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 saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? The write up confuses me. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. Open to suggestions about best course of action. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). Covers me to 100K. 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. It will show up as a misfire code in a cylinders 1,4,6, or 7. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. 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. The wife however found this deal on an Envoy Denali . Disable Active Fuel Management - Ricks Free Auto Repair Advice A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. Ditto , never buy a throw away vehicle again is my recommendation and my fix . Our 2013 yukon with 47k miles just failed. I asume low oil pressure cant make some of the DOD lifters to malfunction? The lifter seems to recharge whenever the truck sits for some time. Is there any reaction to the disabler when pulling a boat or trailer? Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. 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. [], [] way. It could be the filter screen under the oil sending unit. Have there been improvements in more recent model years employing AFM [2014 or newer]? I dont know where to being to look for the problem. 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. When you drain the oil at three to four thousand miles its still clean. I bought a 2022 GMC Sierra 1500 with 5.3L, X31 off road package a year ago. Thankfull for any ideeas! In the mean-time I found that you can keep the engine from going into 4 cyl mode by using the manual shift (if so equipped) and keeping it out of 6th gear. One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. hi brian when you replace the lifters do you have to change the guides also? When they are locked into position, they wont wear further and cause issues down the road. thx Brian, Knock on wood I drive a 2011 silverado 44 Ltd with the 5.3 AFM/DOD not tuned out or delete being used and have experienced no problems or any sign of problems for that matter juat rolled over 210,000 all original factory parts would you suggest I tune it out or juat let it ride I change my oil religiously and also use lucas products for all aspects of my motor. The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. 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. Yesterday my motor (116,000 miles) felt like it went into limp mode when decelerating from 8 cyl to 4 cyl but it recovered.This is the second time that this has happened in 6 months so I think that I am on the slope. Deactivating cylinders at light load forces the throttle valve be opened more fully to create constant power, and allows the engine to breathe easier. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. I remember those Other GM vehicles that the consumer tested for GM and paid GM for the honor. Im praying that my RangeTech buys me a few years. .IMHO . The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. How to Delete or Disable Active Fuel Management (AFM) I may just do that Vic. Does the Pressure relief vavle ever go bad?? My 2013 LC9 just had #6 lifter fail, got a misfire code but the ticking gave it away. If I put my truck in manual 5, it doesnt try to go into V4 mode. This reduces expense when you build it [], [] intake, and a cable-driven throttle body, plus Im also installing Trick Flows VVT and AFM delete kits. 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. Pulled the inntake and replaced valleypan With all the solenoids. They have plastic casing, so you can imagine what will happen with aged plastic. A 17 with 5.3. 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. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. I am trying to find out of this is true. It depends on the failure mode of the lifter however, certainly worth a try. The valve itself is part number W0133-2574213. I have had some say that it is the valves and others say that it is the cats plugged. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. Engine starts but is throwing a misfire on cyls 4,7. I would rather stay a V8 full time than deal with AFM issues in the future. 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 engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. We need availability of a replacement engine without the AFM. I would. Is the Pressure relief valve replaceable? I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. If you ignore it and keep driving, odds are you will destroy the cam as well. Hopefully he can free up the stuck/collapsed lifter. Hi. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. Having a hard time finding one .. On one hand it has an aluminum block, which is nice. Unfortunately, I found out about the lifters too late. Learn how your comment data is processed. Excess oil will be pushed out of the pressure relief valve into the oil pan. New plugs and wires. 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 a 2007 Gmc Envoy Denali with LH6 cant find a good LH6 engine but I found a 2011 LC9 engine w 52000 miles will everything plug up or what am I getting into? Bought an 07 GMC Yukon 5.3 with the AFM, 87k. stalled in a certain way a warning wouldn be a bad idea. The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. 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. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. Friend will send to me from Arizona. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of . 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. Send response to tkrieg@cox.net. Active Fuel Management About Gone From 2022 Silverado Lineup - GM Authority GM offers the following diagnostic steps in determining if this is the problem. What type of ODBII gadget did you use? Brian, thank you for the quick response. Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. Thanks for the detailed post! Very confusing stuff out there. Oil flows to the special lifters through theAFMtowers. [] 5.3L engines start in the $600-$1,000 range and go up to a little more than $2,000 for the 6.0L and 6.2L engines. My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. Thanks. More information can be found in the GM TSB bulletin number 10-06-01-008g. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. 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). GM Dynamic Fuel Management Cylinder Deactivation Technology - GM Authority I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. Not sure what else it can be. 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. How about if they just let us have a manual transmission agains for fuel mileage? My daughters car had about 230,000 miles when she complained of the problem. Cylinder misfires (most common sign) Rough idling, poor acceleration, loss of power Check engine light with engine misfire codes Air-to-fuel ratios are either running rich or lean The easiest way to tell that you have an injector problem is through the check engine light and engine codes for misfires. Cylinder Deactivation & Variable Engine Displacement - LiveAbout [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes Run it and let it soak overnight. AFMlifters have a history of failing and oil consumption can be a problem. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. [] Here is a guide on how to turn off AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] Guide to disabling AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] Here is an article on how to deactivate AFM. If I put the Range module on, is that all I need to do, both now and long term? 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. I wii be using this truck to haul a camper for full time RV living and am thinking of a tuner to shut off AFM and maximize performance and economy. 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. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! It came back on last Wednesday starting with a flash. What the biggest reported problem with Chevy Silverados? GM switched over to the 4100 v-8 in 1982. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. I have a 2011 GMC with over 162,000 miles on it and it runs great! But then she passed away from cancer. What was happening to the first is slowly (or quickly in your case) happening to the others. Regardless of the AFM solenoid being commanded on or off. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. Cylinders two, three, and eight are all similar in cylinder deactivation. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 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. Have misfire code and engine has what I would call a surge while driving. I just bought a 2018 Silverado. This is what I keep telling people. , Production date on the vehicle is 04/2006 oddly enough. the extra oil isnt needed. Then again, it should have never been controlling those solenoids. If the lifter actually fails so that the mechanism wont release, it wont work. However, the fuel savings are not always as much as expected.
