The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. 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. Given that, would you recommend buying one of the OBD-II devices to disable AFM? Then I guess I have to spend a bunch of money and get the delete kit. Are there errors or something only the dealer can clear? It was good for about 10 miles and started with same loud knock noise. 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. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. I contacted service manager in Gastonia, NC and he was kind enough to tell me the whole history of the problem.. EPA required better fuel mileage and less emissions and GM, Ford and Honda(V-6) came up with this failed AFM system. Once I get it back, could I install the Disabler safely. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. 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 ! This video covers the steps youll need to take before upgrading to a larger [], I am installing a complete delete system, just wondering what it will do if dont plug the oil pressure relief valve? Active Fuel Management About Gone From 2022 Silverado Lineup - GM Authority This update also saw the usage of cylinder deactivation technology or Active Fuel Management. AFMengines use special lifters for cylinders 1, 4, 6, and 7. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. This is my second Avalanche and I never had any issues with either of them. But then she passed away from cancer. The Jury is still out on the Gen. 5s but the warranty could be an issue. Basically rebuilt most of the engine while in the vehicle. Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. A 17 with 5.3. If I had wanted a 4 banger I would have bought one. Is this the shield you referred to in a past post? Next day I drove my car to work and was fine but when I left work all lights came back on and terrible noise in the hood. All these comments on the 5.3 are blowing my mind!!!. The engine also had 799 or 243 casting heads which are closely related to the LS6. 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. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. Most of all, my concern is reliability. 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 cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. 4,7 plugs foul runs rough at idle. 330-630-0240. how many miles do you have on your engine? As we were installing the sensors prior to installation in the vehicle, we noticed that there was no fitting on the oil pan for the oil level sensor. Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. 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.
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