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? Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. Engine oil pressure is fine. I just did the delete and replaced the cam as well. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. As GM issued 13 updatesnone of which workeddealers disabled the system on their customers' cars, leaving them permanently in V-8 mode. Weve written some articles on the various Vortec engine upgrade paths, such as this one on LQ4 and LQ9it discusses some of the better options for choosing a cam intended for use in a truck. Thanks. Cylinder Deactivation: What Is It and How Does It Help Save Fuel? Brian, we have a 2007 Yukon Denali in our shop with a 6.2L v-8 that has suffered a lifter failure with camshaft damage. Covers me to 100K. Well, they move a couple of times after startup thats all.Asume its the same on syl 7 on the other side.Disconected the Connector to the solenoids, no difference. Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. Theyre also notorious for bad cam tower oil leaks. Replace the cam or do the delete kit? PDF GM LS AFM Deactivation Lifter Issues - Melling They shift cam lobes by sliding the cam, never actually shutting down the value but riding a different lube! The valve itself is part number W0133-2574213. Pushing forward. I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. [] 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. Driver reported this occurred suddenly while driving down the highway. This is my project car and will be my drive (about 5000 miles a year). I have only put about 600 miles on it and noticed that the oil was a bit low and am hoping that it was that way when I picked it up. So now at 168 thousand miles it still runs good but gets bad gass mileage. She drove it for another 35,000 and it went out again. Dave, I also have a 2008 LTZ avalanche with 106,000 I have the exact same symptoms at this point I just want to sell it will the disabler help remove the check engine light wont pass inspection with light on thanks for your help Chris. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. The engine will switch to operating on fewer cylinders when cruising at a constant speed. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. Im crossing my fingers it does the trick! Perhaps a flaw by design would be a more appropriate description . 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. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. Why cant u just unplug the solenoid on back of engine by oil pressure sensor? Last GM Ill ever buy unless its got a diesel. I read something the other day which I found to be funny. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. As it turned out one of the cam bearings was failing and causing the cam to wobble (my guess) which messed up the AFM and probably some other stuff too. 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? Would it be fine to go ahead with the AFM Disabler? A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. Very confusing stuff out there. 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?? GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. Only thing I noticed with the oil consumption issue. When cruising on the freeway (for example) in 4 cylinder mode and jumping on the throttle to pass or get out in the fast lane, there is CONSIDERABLE and annoying and dangerous lag, like 3 seconds, and this is a problem. When cylinders are deactivated, the number of crankshaft rotation increases between firing pulses. Brian, The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. Thank you. What type of disabler did you go with? 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. 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. Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. Unfortunately, I found out about the lifters too late. Whats the next step? so the trans fluid worked for you then? Pod. 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. Just pulled it down in the garage there was no other damage , luckily. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. It could be the filter screen under the oil sending unit. One the other hand, it came without AFM, VVT, or flex fuel capability. I called my service station and they told me to get it in ASAP. 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. A V8 firing all 8 cylinders sees 90 degrees between combustion events, while a 4 cylinder engine lengthens this to 180 degrees. There has been a lifter noise since I bought the truck 1 year ago. The motor I pulled was a 2007 LY5 with about 77k on it. Thanks for the advice Brian! the body is in great shape. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? He claims that GM used the same engine whether it was or was not equipped with AFM in this year and model? Then again, it should have never been controlling those solenoids. For fun, he runs his 427-powered C5 Z06 in ECTA land-speed racing, at OPTIMA street car events, and at a mix of autocross, drag racing, and track days. GM uses 3 different styles all are engine specific. With 40000 Your email address will not be published. Regards, Some guys have been able to use a tool through the top with the cover off to get it to release. I will be installing the AFM deactivator tonight when I get hoe. Have not had a problem yet. The Hit and Miss Nature of Cylinder Deactivation Systems Now I get 24 to 26 with deactivation locked out and full power. Wed recommend a call to our partners at Summit Racing. If you just crack it without it starting it moves all the time . My 2002 I had over 298K on it with no engine related issues. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. It actavated the lifter? Definitely dont want to do anything to fix one problem and create another. Brian, I have a 2010 burb with the exact same symptoms and questions as Shawn please help! Then changed the oil. AFMengines use special lifters for cylinders 1, 4, 6, and 7. The oil-pressure controlled system that operates the special lifters is VERY prone to failure, if the oil is not changed on time, OR if the wrong oil is used. How long did it take? Dod is the biggest failure sence the 8-6-4 caddie in 1981. Yes a poor design but a flaw ? 1981 Cadillac V 864. Its not GMs choice to use AFM. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . 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. What type of ODBII gadget did you use? The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . Hi Brian, . 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. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). 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. Really could use some pointers. Our 2013 yukon with 47k miles just failed. The lifter seems to recharge whenever the truck sits for some time. , Production date on the vehicle is 04/2006 oddly enough. Have an intake and Borla exhaust. will feel like a jerk asking the clerk at lowes to cut them again. When an engine is contstantly running on oil that is broken down, it not only wheres out components because of no protection. I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. GM claims fuel improvements ranging from 5%-15% depending on the engine. 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. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. Everything was fine for two weeks, ow customer complains s it same noise it made as before. Take a look at what bmw did in its R1250 bike. The exhaust valve remains open during the intake stroke and closes just before BDC. also in the pan is another AFM oil filter near the external engine oil filter. Because I want to. Will this AFM DISABLER damage anything???. 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. More information can be found in the GM TSB bulletin number 10-06-01-008g. They replaced all the lifters, said no other damage, problem lifters were on cylinders 6 and 7. Ive been reading, with disgust and concern of the lifter/cam situation. If you think GM pioneered cylinder deactivation, guess again But then she passed away from cancer. He used seafoam and changed to synthetic oil. Did not help. It is also known as Displacement on Demand (DoD) or cylinder deactivation. Can you tell me what needs to be done with the VVT? I have an 07 Yukon with 230k on the engine. 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. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? whith a disabler. Truck ran fine before that. Had nothing but trouble out of it. Another General Motors 5.3L V8 Lawsuit Filed | GM Authority Sylinder one lost compression on my 09 5,3. I pulled the head off, replaced the lifter and put the gadget in the ODBII for about $400 total. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. On the AFM lifters that dosnt work i have installed them With the oil hole Down! Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. We need availability of a replacement engine without the AFM. Some drivers want V8 power under their foot at all times. This replacement engine has the same camshaft sensor plug plug, 5 wire like the AFM would use, instead of the 3 wire. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. Remembered that after I bought my Tahoe. Logic says that it should not as the ECM isnt programmed to use AFM, but will it see a lack of resistance from no solenoid pack plugged in? Because its not just GM that have engine problems. If you left the original cam in, the AFM cylinders will be down about 25 lbs. No clue what to do. A 14 gmc 5.3 Sierra 85000 miles On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . Toyota has their own problems. I have no clue what to do now. a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. I sold them when they were new. No other V-8 truck of similar weight can do that (except another GM with AFM). I would appreciate it if you let me know how you make out. Thankfull for any ideeas! Are you saying that I am in the clear by a year and issues fixed? Go Small? Common Problems With the Chevy Silverado 2.7L Turbo The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). Corvette that does employ AFM. Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. Hi Mike, the metal shield you noticed is probably the windage tray. The collapsed lifters will not engage the pushrods and both valves remain closed. I recently took a long trip and it burned 1.5 quarts of oil. Brian, I have been reading your article about the AFM. Yes thats true. Would never take it on a long trip. So I did the job one more time. I am going to do the full repair of the engine now, but not an overhaul (too hard to get at the pan). I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. I have always loved Ford and Chevys , I dont like this Vehicle not one bit, starring shaft has to be lubed or it whines, front A arms has done been replaced, tapping in motor, leaf springs has been lubed, retorqued, put completely new leaf springs back in on the rear , grease all down from rims to body of truck, you have to clean often,console shakes as if milk shakes in console which later they also put rubber bushings in front of coils of shocks ( front end) .You lock it down in 44 it s metal to metal , As of now Im at 32,000 done gone threw all the arbitrator laws depending on how it goes? I know a few guys with Tundras. My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. You are correct. I have a 2014 Silverado with a 5-3. 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . 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. The engine has flex-fuel capability. Will the plug in deactivater fix the oil consumption or will it cause more consumption? I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. So for all of you that continue to complain about how bad these things are. I have no other engine problems and Id like to fix the issue. Then it takes out the lifter again and again until you bite the bullet and replace the cam. I would just have the AFM disabled (tuned out) then. Since it is not costing me anything out of pocket, I did not go with the Delete Kit (did not want to spend the money). I have read synthetic isnt good for AFM lifters. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. I have 4 GMCs in my driveway right now only one with AFM its always popping DTCs, 06 Yukon (not AFM)never had a light in 12 years! 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. Gary, [] 3 engines didnt have AFM (Active Fuel Management) or VVT (Variable Valve Timing), so you dont have the expense of an AFM or VVT delete []. Send response to tkrieg@cox.net. I just took a long trip and it used 1.5 quarts of oil. 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. Id wait until the warranty expires then disable. 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. Still have no power. I would. How is that an improvement. Next day, fired it up to take the the junk yard and it ran great. Chevy Silverado V8 To V4 Problems - Tools Bible WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. . This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. Ayush Srivastava If you ignore it and keep driving, odds are you will destroy the cam as well. Did Obama make them do this? All these comments on the 5.3 are blowing my mind!!!. I guess I might have to call a dealership or GM to get a definite answer on this one. 2011 Chevy Avalanche LTZ. But I can replace all of the other engine parts without doing the pistons and bearings so that is what I plan to do. The 5 Most Common Chevy EcoTec3 5.3L Engine Problems Anyway that horrible experiment was in the late 70s early 80s along with those converted Diesel engines..those like the 8-6-4 nonsense were just terrible failures. 50,000 miles. Or not because it is the cast iron block and not he aluminum block? If the lifter actually fails so that the mechanism wont release, it wont work. It depends on the failure mode of the lifter however, certainly worth a try. They layed over night in engine oil before instalation. 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. Brian, thank you for the quick response. Better airflow reduces drag on the pistons and the associated pumping losses. I have a noise in the engine but it seems to go away when revved up. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? There are so many more oil passages on engines these days. 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. Run it and let it soak overnight. GM Active Fuel Management Cylinder Deactivation Technology - GM Authority It was the first Gen. IV LS truck engine and offered Active Fuel Management (AFM). GM should recall every vehicle with this terrible design flaw! All Gen IV engine blocks haveAFMtowers and oil passages cast in. The Jury is still out on the Gen. 5s but the warranty could be an issue. I have ordered an ATM disabler and will be putting a can of Textron in the gas at the next fill up. You also need the disabler installed in your obd connector. it is the regulator guy! I have 1999 5.3 Silverado that gets 19-20 miles to the gallon all the time this shit pile with dod only gets 14 miles to the gallon. Number 7 cylinder lifters stops moving when truck starts. In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. Also putting in a new transmission vs. rebuilding. Hopefully more is known by then. Call chevy.They should being paying most of that. The Definitive Guide to LS Engine Specs and LS Engine Upgrades, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance - OnAllCylinders, LS Engine Bore & Stroke Chart - OnAllCylinders, http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc, Range Active Fuel Management Disable Device, LS9 6.2L Engine Upgrade Guide: Expert Advice for LS9 Mods to Maximize Performance - OnAllCylinders, LMG 5.3L Engine Upgrade Guide: Expert Advice for LMG Mods to Maximize Performance - OnAllCylinders, L59 5.3L Engine Upgrade Guide: Expert Advice for L59 Mods to Maximize Performance - OnAllCylinders, L76 Car Engine Upgrade Guide: Expert Advice for L76 Car Engine Mods to Maximize Performance - OnAllCylinders, LH8 5.3L Engine Upgrade Guide: Expert Advice for L20 Engine Mods to Maximize Performance - OnAllCylinders, LH6 5.3L Engine Upgrade Guide: Expert Advice for LH6 Engine Mods to Maximize Performance - OnAllCylinders, LFA 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders, LFA 6.0L Engine Upgrade Guide: Expert Advice for LFA Engine Mods to Maximize Performance - OnAllCylinders, LZ1 6.0L Engine Upgrade Guide: Expert Advice for LZ1 Engine Mods to Maximize Performance - OnAllCylinders, What the New LT2 Mid-Engine Corvette Reveals About the Future of GM LT Engines, All the Torques: How Summit Pro LS Truck Camshafts Help Truck Owners Maximize Performance, LMF 5.3L Engine Upgrade Guide: Expert Advice for LMF Mods to Maximize Performance - OnAllCylinders, L98 6.0L Engine Upgrade Guide: Expert Advice for L98 Mods to Maximize Performance, LQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 & LQ9 Mods to Maximize Performance - OnAllCylinders, Range AFM Disabler Reviews | Range Technology AFM Disabler 2019, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance, LM7 5.3L Engine Upgrade Guide: Expert Advice for LM7 Mods to Maximize Performance, LS4 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L76 6.0L Car Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L96 6.0L Engine Upgrade Guide: Expert Advice for L96 Mods to Maximize Performance, LC9 5.3L Engine Upgrade Guide: Expert Advice for LC9 Mods to Maximize Performance, LH6 5.3L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, LZ1 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, Chevy 4.3L Vortec Common Engine Problems - Vortec 4300 V6, https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-…, The 5 Most Common Chevy EcoTec3 5.3L Engine Problems, Chevy 6.0L Vortec Engine Problems - Common Vortec 6000 Problems, The 4 Most Common Chevy EcoTec3 6.2L Engine Problems, Gen 3 vs. Gen 4 LS Engines: How to ID Them (Video), Ask Away with Jeff Smith: Upgrades to GM LS 6.0L 4x4, LM4 5.3L Engine Upgrade Guide: Expert Advice for LM4 Mods to Maximize Performance, L33 5.3L Engine Upgrade Guide: Expert Advice for L33 Mods to Maximize Performance, Mailbag: Choosing an Engine Management System for an LS-Swapped '82 Olds Cutlass. 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. .IMHO . Its not possible to install them wrong? This is in response to pretty much everyone. The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. AFM/DFM Disabler - Range Technology I would rather stay a V8 full time than deal with AFM issues in the future. 5.3-liter Chevy Engine Problems: What Should You Look Out For? I couldnt agree with you less, yet I respect your opinions. How to Delete or Disable Active Fuel Management (AFM) There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. GM 6.2 Active Fuel Management Problems: What They Are and How - CarAraC You will get codes thrown if the afm is physically removed without telling the ECM you did so. GM offers the following diagnostic steps in determining if this is the problem. I hate it. Dont want to make a move on a new truck or jump to a 2500 yet. Pulled the inntake and replaced valleypan With all the solenoids. Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. Mine did at the exact same time. Now you tell me AFM works and I will tell you; that you are full of shit! The trucks are only supposed to use two four. Replaced all 16 lifters due to collapsed lifter on CYl #4. CHANGE YOUR OIL!!!!! The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. I have a shop 39 yrs . My question is: do I install the electronic disabler on the new engine to avoid future issues? All the time. I am hoping this does the trick.
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