Does an 08 GMC Sierra have active fuel management?

There is a problem with the active fuel management systems on ALL 2007-2008 Sierras that have the 5.3L or 6.0. The 4.8L model does not have active fuel management. For the old timers out there, it is the same issue as the Cadillac V8-6-4 engine.

Is the GMC Sierra 4.8L Active Fuel Management?

The 4.8L model does not have active fuel management. For the old timers out there, it is the same issue as the Cadillac V8-6-4 engine. Make no mistake, If your vehicle has active fuel management, you have a problem!

How does the Active Fuel Management System work?

The Active Fuel Management system is designed to increase the fuel economy of your engine, without decreasing its overall power potential. Read this article to find out just how this system works. This article applies to the Chevrolet Silverado GMT900 (2007-2013).

Is the Chevy Silverado an Active Fuel Management car?

It stutters and tugs going up hills and doesnt know when to shift. Plus it has a distinctive rough idle. It has a subtle noticeable pop when AFM kicks in and it sucks to drive it. It is going back to dealer again soon but they are saying that it might take 5000-7000 miles before the brain learns my driving habits. HEY!!!!!!!!!!!!!!!

Are there any AFM problems with the GM 5.3L V8?

Now, to be fair: Not every GM 5.3L V8 has problems with AFM. Many consumers report a trouble-free ownership experience. Still, AFM problems exist. The AFM excessive oil consumption problem usually crops up on vehicles that go on long highway drives. These kinds of trips don’t put much stress on the engine, so the AFM system deactivates pistons.

How does Active Fuel Management ( AFM ) system work?

The Active Fuel Management (AFM) system is also known as “cylinder deactivation.”. This technology allows the engine to disable half of the engine’s cylinders at lower RPMs, reducing fuel use. AFM usually kicks in under light-load conditions, and it’s been shown to improve fuel economy by up to 7.5%.

What is range technology Active Fuel management tool?

Bought a 2011 Chevy suburban with 125,000 and noticed it was drinking 2 quarts of oil between changes of 5k miles. My mechanic told me to order this tool. He said GM 5.3L active fuel management has a lot of bugs with valves -lifters failing. This tool keeps all 8 cyl running while at idle.