Looking to tear down myself. 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. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. Are you saying that I am in the clear by a year and issues fixed? Replace the cam or do the delete kit? I ordered a electronic disabler for it today. whith a disabler. 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??? With that said, the current global chip shortage has been affecting the industry on a wide scale, forcing production halt among several automakers. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. I remember those Other GM vehicles that the consumer tested for GM and paid GM for the honor. 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. This should be added to your earlier model if you experience oil consumption. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. 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. 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. At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. 2012 5.3 Tahoe AFM, #4 lifter collapse,replaced all lifters,started engine ran ok, then rough, got #6 misfire code. I am having that done today on my 08 Suburban and its only costing me $225. What makes you think it was a design flaw ? General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. Took it to a shop and they advised that it could be due to the AFM system not functioning properly. I just got new warranty engine and dont want this issue again? Billy, there is some interesting trivia here on the L92. Thank you again for the response. Now the problems back, I have 180k miles on it now. 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. misfire or anything. But I can replace all of the other engine parts without doing the pistons and bearings so that is what I plan to do. I have a 2011 Chevy Tahoe with the 5.3 Gen 4 LS (VIN Code 0) and I bought a CAM motion DOD/AFM delete kit, 3 bolt drop in CAM Motion stage 2 camshaft, VVT delete kit and finally a Diablo Predator 2 Premium for GM programmer. It has AMF. You were lucky that it worked. I can tell you for the past 2 years I changed out my LC9 5.3L fully synthetic oil every 3,000, even though Mobile Oil claims 10,000 miles or more. .IMHO . Is there any reaction to the disabler when pulling a boat or trailer? I am confused about the plug in disabler. 2 15 with 5.3 Sierras both with 100k and I went with the new motor for the warranty. There has been a lifter noise since I bought the truck 1 year ago. I have had some say that it is the valves and others say that it is the cats plugged. I have a 2011 GMC with over 162,000 miles on it and it runs great! $8500.00 fix. Took the heads off again. It does seem that when they start goingthey go quickly. If possible, will simply not using VVT provide a powerful,good running engine? Run it and let it soak overnight. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. With 44, its a enormous Jon to remove the oil pan. I have a 2012 Chevy Avalanche. Seafoam with syn oil change only fixed for a week. This happened on a camping trip with my kids last friday night. 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. 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. This is in response to pretty much everyone. It could be the filter screen under the oil sending unit. I know a few guys with Tundras. Not sure which direction to go from here. My point is that the engine likely on uses dod a small percentage of the time so can not really imagine that the delete causes any more issue than normal which may be the high oil consumption but do all of these engines with dod consume a lot of oil? But if you dont like it. There are no changes in the valves or the springs. The problem I am facing is that I want to drive this vehicle for at lease another 77K and do not want to drive my vehicle with this AFM issue. Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. Its got a hundred forty-five thousand miles on it. Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). Solenoids, new lifters also test voltage to solenoid pack all good their, Take a look at what bmw did in its R1250 bike. How is that an improvement. Should I wait until the warranty runs out, or will that be too late to stop possible damage? What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. I have ordered an ATM disabler and will be putting a can of Textron in the gas at the next fill up. My 2013 GMC Yukon XL 6.2L is currently having a failed lifer replaced. Changing the sensor didnt help. Definitely dont want to do anything to fix one problem and create another. i currently get 8 mpg with the vortec 350 and a 4l60, I have a 99 Sub k1500 that i get 16 to 18 hwy loaded lightly, I get about 14 on my 95 Tahoe 2 door with 5.7 and 4l60. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. I have a 12 with 4.8 Silverado 75000 miles Would it be fine to go ahead with the AFM Disabler? Perhaps a flaw by design would be a more appropriate description . Didnt change exhaust nor tune so likely no change in power/torque. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). I am considering the same. Their tech guys have seen it all and may have some thoughts on this as well. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. Disable the afm. Most will want to get rid of the AFM immediately. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. Battery was unplugged for a week.. Regarding the cylinder deactivation impact on fuel consumption . Every one of these engine will have a lifter fail, this is a travesty! I service plenty of these vehicles with AFM, and the ones I have to open up the engine for repair because of a failure doesnt surprise me anymore. But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. They layed over night in engine oil before instalation. 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. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. Since the tranny oil worked, you should now change the oil, right? What if I was able to trick the computer into thinking it is in 5th gear when it is actually in 6th? Did gm make a non-dod version of the 5.3 with iron block that would work in my application? 330-630-0240. Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. Change your oil. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. The LZ1 was upgraded with AFM and []. 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 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 []. 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. HELP, I have 2005 envoy that runs makes lifter noise then dies in about 30 seconds then I started it one day and it ran with little noise for 5 min started next day and it starts and dies again got heads off was told I could put ls 3 lifters in is that true or is there something else I could do thanks Duane. Just recently, GM announced a temporary closure. 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. All Gen IV engine blocks haveAFMtowers and oil passages cast in. If someone didnt want to spend gas buy a Toyota. RANGE TECNOLOGY.COM. If buying a tuner/chip which works best for that truck/engine? With 40000 Was a disaster then but a profitable disaster. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. And consider using a higher grade of engine oil like Mobil 1 or Amsoil, etc. I have an 07 Yukon with over 180K. Cost about $250, but it is not fool proof. Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . I recently bought a 2018 Silverado 5.3L with AFM. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. Number 7 cylinder lifters stops moving when truck starts. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. Excess oil will be pushed out of the pressure relief valve into the oil pan. 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. I love the car so far. If you are using VVT, you could use the NAL-12612273 (L92) cam. Engine oil pressure is fine. Engines with AFM use a high-volume oil pump. I have already dropped a lot of money on this truck (08 suburban). All the time. We need availability of a replacement engine without the AFM. Hi Brian, Is this an issue only with GM SUVs and trucks, or does it include cars too? 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. 4,7 plugs foul runs rough at idle. My fear now is not will it happen but when! The trucks are only supposed to use two four. Drives way better for my mostly paved road driving. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. Oil 0w or 5w -20 Im always sorry to hear when people run into issues like these. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. Not sure what else it can be. in your opinion will this work, i really dont see any reason it wouldnt. Only running on drivers side cylinders. Vehicle has been serviced more regular than the manual calls for and the AFM has caused problem after problem with fouled plugs. I would rather stay a V8 full time than deal with AFM issues in the future. [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. Because its not just GM that have engine problems. Toyota has their own problems. Will the plug in deactivater fix the oil consumption or will it cause more consumption? It has has 9000 miles and no lifter or other issues or codes so far. I recently bought a low mileage 2013 Silverado and the lifters collapsed. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. the extra oil isnt needed. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. It seems this tough engine has everything incorporated into it. I am trying to prevent same issue. Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. The write up confuses me. [], [] rugged iron block 6.0L came with VVT, but without Active Fuel Management, which saves you the cost of an AFM delete [], [] The LH6 engine is a 5.3L Gen. IV aluminum engine that replaced the LM4 in 2005. 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. I have also heard that the oil pump is to be changed and I have also heard that it does not matter. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. My 5.3 has a vin code of O. 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.
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