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Double digit MPGs in my 98 K1500 would be a dream lmao. Just one or two. I asume low oil pressure cant make some of the DOD lifters to malfunction? Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. All these comments on the 5.3 are blowing my mind!!!. NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades. A 17 with 5.3. They took the engine down today found so much damage inside they ordered a new engine from Detroit. 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. Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. 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. has 92,000 miles and was just told I have cam and lifter failure. As you said, the ECM was never seeing the AFM so I think youre good to go. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? 50,000 miles. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. The engine has flex-fuel capability. It was well researched and tested back in the late seventies and eighties . This is my project car and will be my drive (about 5000 miles a year). 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. There has been a lifter noise since I bought the truck 1 year ago. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Yeh truck has 5237 miles on it AFMengines use special lifters for cylinders 1, 4, 6, and 7. I recently bought a 2018 Silverado 5.3L with AFM. 8000 grand for the repair mine was 1,700.00 to repair, I had a 2004 small block v8(4.8) 331,000 miles on the truck,it was the usual on the maintenance front axles,etc. There is a chance the cam lobe was stressed and started to deteriorate. Then again, it should have never been controlling those solenoids. It is also known as Displacement on Demand (DoD) or cylinder deactivation. I bought a 2022 GMC Sierra 1500 with 5.3L, X31 off road package a year ago. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. Pulled right valve cover an rockers on syl 6 dont move. Clean oil is crucial. While the system sounded good, the microprocessors scrambled to activate, deactivate, and then reactivate cylinders as driving conditions quickly changed, causing the car to hesitate, buck, and stall. The VLOM consists of 4 electronically operated solenoids and is bolted to the top of the engine block beneath the intake manifold assembly. Toyota will be my next truck unless GM owns up and makes wright with consumers. I am not in a position to have a new cam and lifters installed but Im also not in a position to not having a running truck! The early part of his automotive career included working for engine builders Scott Shafiroff and C.J. Go Small? Common Problems With the Chevy Silverado 2.7L Turbo The car runs great apart from the shuddering at those speeds. 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. Yes thats true. 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??? 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. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. Have not had a problem yet. These trucks cost too much to have a terrible product. Number 7 cylinder lifters stops moving when truck starts. I am trying to find out of this is true. The GM 2.7-liter L3B Turbo four-cylinder engine for Chevy Silverado and GMC Sierra pickups is meant to change minds about power and torque in a small package. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. 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 . So for all of you that continue to complain about how bad these things are. After all we bailed them out of bankruptcy. TheAFMsystem can be identified by its components. Wed recommend a call to our partners at Summit Racing. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. GM Active Fuel Management Cylinder Deactivation Technology - GM Authority 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. Removing ignition lock cylinder when it won't turn at all I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? It had the AFM wiring & lifter cover installed with solenoid pack in the original engine, we even removed it to inspect. This should be added to your earlier model if you experience oil consumption. 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. That might show up if you cut the filter and looked for debris in the pleats. 2011 Chevy Avalanche LTZ. AFM sucks Im paying for a truck that has broke down twice replace the cam and lifters and now its broke down again 105000 miles never heard of that in a 350 Chevrolet. Took the heads off again. Thanks for your help. Did gm make a non-dod version of the 5.3 with iron block that would work in my application? Every one of these engine will have a lifter fail, this is a travesty! . Last GM Ill ever buy unless its got a diesel. We need availability of a replacement engine without the AFM. . Regarding the cylinder deactivation impact on fuel consumption . Ive been reading, with disgust and concern of the lifter/cam situation. NOT GOOD!! She had driven it for a couple of months that way. Seems like the AFM disabler device is working for a number of people including myself as the 5.3l AFM engine has inherent design faults. I got the AMF disabler anyway and so far so good. My question on a 2007 Chevy Tahoe 5.3 AFM Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. If I put my truck in manual 5, it doesnt try to go into V4 mode. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. No problems with any to this point. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. it is the regulator guy! Lost number four Some drivers want V8 power under their foot at all times. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. When you drain the oil at three to four thousand miles its still clean. My 5.3 has a vin code of O. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. I ran 0W-20 no more the 5000 miles between changes. (Bought car 1 day before lifter died!) Only thing I noticed with the oil consumption issue. Hopefully more is known by then. []. 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. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. They are taller and have special oil holes. Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? Cylinder Deactivation & Variable Engine Displacement - LiveAbout The lifter came apart and chewed up the lobe on the cam Im selling it I also told my friend at work when he asked me about my truck .I said Ill never by another GM ever. I read something the other day which I found to be funny. He used seafoam and changed to synthetic oil. I cant really tell from driving. [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Thats not all bad because it saves the cost of an AFM delete kit. In other words, the crankshaft and bearings were not visible. My concern is if I leave the non-AFM lifter cover in place & have nothing to plug the 5 pin AFM solenoid connector into, will I get a MIL? I remember those Other GM vehicles that the consumer tested for GM and paid GM for the honor. 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. I love the car so far. The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. If you left the original cam in, the AFM cylinders will be down about 25 lbs. I had to replace them all and the camshaft as well. Accept i only have 60K on my truck and it hasnt recovered. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . There are so many more oil passages on engines these days. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. A custom tune by a knowledgeable tuner with access to a chassis dyno will pay a lot of other dividends other on top of turning off afm and VVT. I wouldnt trade my 2000 Silverado, 5.3 liter that has constantly gotten 20 mpg since I bought it 15 years ago, for a dozen of these new $50,000 POS. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. You were lucky that it worked. I have a 07 Yukon with 180K and no issues what so ever. Truck has an active P0300 code and runs very rough. 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? Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). Changing the sensor didnt help. in your opinion will this work, i really dont see any reason it wouldnt. GM claims fuel improvements ranging from 5%-15% depending on the engine. How stupid do you have to be to whine like a welfare check cashing idiot when there are literally 3 or 4 different ways to totally disable AFM. Once I get it back, could I install the Disabler safely. AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. 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. Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. I am trying to prevent same issue. This allows the engine to run in V8 mode. I have a noise in the engine but it seems to go away when revved up. They lasted one year with big problems. module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode.