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690 posts · Joined 2011. #1 · Oct 9, 2019. I'm looking at buying a 2012 Silverado 1500 with a 5.3l engine. It has that AFM system in it and currently has 117k miles. Some people say these are very problematic with having lifter issues. It doesn't seem to have any ticking sounds and has always been dealer serviced.
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In V6, AFM deactivates cylinders 3 and 6. For LTA and LT2 engines, the cylinder deactivation occurs on cylinders 2, 3, 5, and 8. AFM is also called Displacement On Demand (DOD) or Cylinder Deactivation. In the engine, displacement means the distance a piston moves inside the engine cylinder.
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Active Fuel Management (formerly known as displacement on demand (DoD)) is a trademarked name for the automobile variable displacement technology from General Motors.It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy.Estimated performance on EPA tests shows a 5.5-7.5% improvement in fuel economy.
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What year did GM and Chev started with the AFM on the 5.3. Thanks Sort by Oldest first esox07 16442 posts · Joined 2013 #2 · Jul 20, 2017 As far as I know, it was with the 2007. They changed to the NNBS body style halfway through the 2007 production year and with that came the 5.3L with AFM.
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3,420 Mar 2, 2021 #2 Yes, it is. No, it hasn't even been resolved, nor will it be. If you don't want AFM, the 6.0l engines don't have it. What is weird is how some trucks can go 250-300k miles with it and not have a problem but there are brand new 2019/2020 trucks destroying lifters at 1,500 miles. Even disabling AFM isn't a guaranteed fix.
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What was the first year the 5.3 was offered with Active Fuel Management (AFM)? 2003 Chevy CC SB Duramax 143K completely stock. 2002 VW Golf TDI 161K moderately modded and still 43MPG. 1989 F150 275K RIP, dead in the driveway. Save Share.
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Before we dive into the issues, let's take a glance at the history of the Chevy 5.3 and what vehicles you might find them in. The 5.3-liter displacement has remained the same for over 20 years now. It was first introduced in 1999 as a truck variant of the LS engine found in Chevrolet Corvettes and Camaros. Though many of the parts from an LS.
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Wife's '05 TB LT EXT 5.3 aluminum block LH6 sucks a quart every 800-900 miles. Wife still loves it, no car payments for the last 8 years. No biggie. Posted: 6/19/2017 6:52:06 AM EST [#4] Quote History Quoted: Pretty sure you should avoid all GM of any year. Partially correct.
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Chevy 5.3 Engine Braden Carlson Mar 4, 2021 Over the years, the Chevrolet 5.3 engine has grown a cult-like following for its reliability and capabilities. The Chevrolet 5.3-liter V8 has become synonymous with phrases like "dead reliable" and "indestructible" over the past decade.
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Resources Here is the short answer to Chevy AFM Problem Years In summary, AFM is basically a fuel management system that reduces fuel consumption by shutting off half the cylinders of an engine. In theory and testing, AFM proved to be successful. The Chevy trucks with active AFM were able to reduce fuel consumption by 5 to 7 percent.
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It was used on certain 5.3L, 6.0L, and 6.2L engines starting in 2005 and continued until the release of late-model direct-injected engines. During periods of low engine demand, the system.
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General Motors/Chevrolet produced the 5.3 Vortec engine for nearly two decades from 1999-2014. It spanned two generations of their small block V8, and was finally succeeded by the 5th Generation EcoTec3. Known for its reliability, performance, and stout design, the 5.3 Vortec engine was hugely successful.
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5.3 AFM Years Common Chevrolet AFM Problems 1. Excessive Oil Consumption Low Oil Pressure Message AFM Lifter Noise Changes In Exhaust Tone How to Disable AFM Without a Tune? Disabling AFM With Disabler What are Some of the Chevy AFM Problem Years? From 2007 to halfway of 2011 Chevy trucks have the biggest problems with AFM.
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Keep in mind, you might need to toggle through a few screens before you reach the one that shows the Active Fuel Management information. The display will indicate whether the engine is running as a 'V4' or a 'V8'. If you are attempting to get the vehicle to switch to the V4 state, it will require you to stay at a cruising speed below.
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Feb 28th 2020 General Motors ever popular 5.3L active fuel management was used in majority of trucks and SUV's from 2007-2014. This was one of GM's first designs utilizing cylinder deactivation and active fuel management. LC9, LY5, LC9, LH6 and LMG were the most popular engine codes for this V8 5.3L.
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Excessive oil consumption is the leading culprit in Chevy motors with the active fuel management system. The issue is common in 2007 to 2013 Chevy trucks or pickups with AFM. The AFM allows excessive passage of oil to get past the piston and enter the combustion chamber. The excess oil tends to harden and accumulate on pistons to cause further.