On one hand it has an aluminum block, which is nice. It is being covered under warranty since I only have 72,000 miles on it. Chevrolet 5.3 Engine Issues and Recommendations If so what would the vin code be? Runs better than new now and no more oil consumpsion!! I asked my local Chevy dealer, from whom I purchased the engine, to find out why the oil pan lacked the fitting. All the time. My question is: do I install the electronic disabler on the new engine to avoid future issues? The dealer in Rockhill, SC when asked only said they had not had a problem. Below youll see references to the L99 as a result. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. . Ketil, let us know what you find out. Most of all, my concern is reliability. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. If under the truck while parked and it is doing it it sounds like it is towards the back of motor. Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? This allows the engine to run in V8 mode. How to Delete or Disable Active Fuel Management (AFM) on GM Engines The computers had not evolved enough to control the sytem. 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. I have been assuming this is just a slow to pump-up lifter or lifters. 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. I guess they also went to aluminum blocks in 2007, not sure if that has anything to do with this issues thanks for the advice! I remember those Other GM vehicles that the consumer tested for GM and paid GM for the honor. 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. I am hoping this does the trick. 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. please respond with your opinion. Dod is the biggest failure sence the 8-6-4 caddie in 1981. They took the engine down today found so much damage inside they ordered a new engine from Detroit. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM Its a CA EMMISIONS TRUCK. However, the fuel savings are not always as much as expected. Lost number four Still have no power. One the other hand, it came without AFM, VVT, or flex fuel capability. Having it fixed now, just curious Seems like a problematic design. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. $8500.00 fix. What if I was able to trick the computer into thinking it is in 5th gear when it is actually in 6th? This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. 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. Yeh truck has 5237 miles on it [] engines is that when VVT (variable valve timing) appeared and was later followed by AFM (which is Active Fuel Management, when the engine deletes four cylinders under light load) both of these packages drastically affect []. The write up confuses me. 2018 new truck has me really disgusted If I had checked this out better, there would have been one less POS Chevy sold last year ! I have the towing package on my 13 Tahoe LTZ. 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. 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. Or not because it is the cast iron block and not he aluminum block? From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? While it does still use the GM Active Fuel Management cylinder deactivation technology that caused a plethora of issues on the gen-four Vortec 5300 engines, it seems that GM has solved the issues related to excessive oil consumption. 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. The 2016+ Tacomas are junk. I own a reputable repair shop. But after reading this thread, Im a little concerned about the long-term reliability. Because I want to. All Cylinders. This lowers the cost of building it [], [] aluminum block engine. 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. 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. So for all of you that continue to complain about how bad these things are. Once the lifter has been damaged, the cam is probably also damaged. Does cylinder deactivation affect engine life? - Quora 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. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. Some drivers want V8 power under their foot at all times. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. I have successfully used a gadget that plugs into the ODBII. Im considering just replacing the 5.3 ( should be LMG, 2007 YUKON ) with the L96 crate engine. After reading these forums Im a little concerned about my decision to stay with GM. Active Fuel Management About Gone From 2022 Silverado Lineup - GM Authority The detergent. No other truck my ass .lol my 99 silverado 1500 with the junk LR4 4.8l and 320k miles 9n itgets 21mpg all day long with 93 octane gas in it. I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. Mine did at the exact same time. Go Small? Common Problems With the Chevy Silverado 2.7L Turbo 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. My local mechanic suggested whatever I buy with an AFM he will send off the ECU to have the AFM flashed out. [], [] 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. PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 I have a 2012 Chevy Avalanche. GM uses 3 different styles all are engine specific. i have a 2007 suburban 6.0 and the number 4 intake lifter took a dive.i have already started to disassemble the engine as i plan on replacing all the lifters and reassemble the engine as i never had any other problems with it. I am trying to find out of this is true. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. The valve itself is part number W0133-2574213. Since the tranny oil worked, you should now change the oil, right? He unstuck it and I took it for a drive and same thing happened. 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. [] For more information on AFM, including a comprehensive guide on how to completely remove it from your engine, check out this article. Looking to tear down myself. GM Releases Valve Lifter Service Update For V8 Engines Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. Hi Grant is that disabler still working for you ? The engine also had 799 or 243 casting heads which are closely related to the LS6. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Junk . We recently purchased an 08 Suburban and noticed some shuddering around crusing speeds, usually 45-55mph and highway speeds around 75mph. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit 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? Help appreciated. That might show up if you cut the filter and looked for debris in the pleats. A 14 gmc 5.3 Sierra 85000 miles 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 []. Ive only put a straight pipe exhaust, intake, and a boost controller on it. Why cant you stop the send signals from the computer so that the solenoids dont open and the AFM system is never engaged? What would you do if you were in my situation? Sylinder one lost compression on my 09 5,3. Im crossing my fingers it does the trick! 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. Problems regarding Chevy 5.3L engines ticking noise and misfire. Told her that it would not last and that she needed to find a different way to get around. Have a lifter problem on my 2010 5.3 Silverado. []. Love the truck so far. Never again, except for my gen4 Z28 that has a perfect engine/trans on an otherwise rolling pc of gm crap chassis. When they are locked into position, they wont wear further and cause issues down the road. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. The 2nd went with a conventional valvetrain. I ran 0W-20 no more the 5000 miles between changes. With the AFM tuned off, it shouldnt be trying to switch over to four cylinder mode. Because its not just GM that have engine problems. What was happening to the first is slowly (or quickly in your case) happening to the others. I plan on getting a tuner to disable the AFM. The engine has flex-fuel capability. It has plenty of oil pressure and I put all new lifters in it. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. One must anticipate this. It uses a M14 x 1.5 thread plug like Dorman 65217. Question is, since my 2004 ECM and wiring harness were made before the AMF came about will this motor work properly as a V8 or will I need to replace the lifters, cam, oil sensor, etc as the delete method mentions? My 5.3 is. According to some experts, switching to cylinder deactivation reduces the emissions high somewhere between 4 and 10%, which is a huge percentage of saving the air from pollution. Disable Active Fuel Management - Ricks Free Auto Repair Advice 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? Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. The only solution is to replace the entire cylinder head. I didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. Any problems to watch out for?Did you replace the VLOM? It is currently at the dealer having a new long block installed under warranty. 2011 Chevy Avalanche LTZ. Get this, rebuild is only rings and maybe lifters. The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. I would just have the AFM disabled (tuned out) then. Welcome to socialism folks . I have had some say that it is the valves and others say that it is the cats plugged. The engine had 200K miles. Dont follow just anybody I know where it originates but in todays world I found found it to be amusingly accurate. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] Traded it with 180K miles and did not experience any problems. Run it and let it soak overnight. they are known to become plugged. I am leaning heavily on installing the AFM disabler. I have a 2011 GMC Sierra 1500 with the 5.3. Wed recommend a call to our partners at Summit Racing. do you fill to capacity anyways???? how many miles do you have on your engine? What type of ODBII gadget did you use? PDF GM LS AFM Deactivation Lifter Issues - Melling You are correct. All ready done valve job . Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. I am considering the same. It has 8,000 miles on it. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. Just one. 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? Changing the sensor didnt help. [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). These trucks cost too much to have a terrible product. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. 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. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. 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. The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. I love the car so far. 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. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Getting ready to diy for $450. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. I also notice that it doesnt go into V4 when it is cold. Verified over hundreds of trips, makes no sense. Should I buy one to disable the V4 mode? I asume low oil pressure cant make some of the DOD lifters to malfunction? Replace the cam or do the delete kit? September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. The engine will switch to operating on fewer cylinders when cruising at a constant speed. But then she passed away from cancer. Some guys have been able to use a tool through the top with the cover off to get it to release.
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