The idea behind GM's active and dynamic fuel management systems is brilliant, but they may be asking too much of the poor hydraulic lifters.

Owners of 2014 through 2024 Chevrolet Silverado and GMC Sierra trucks equipped with GM’s L87 6.2-liter V8 are facing costly ...

We discovered that number 4 lifter on the AFM has collapsed. I have had the heads cleaned resurfaced and tested. No problems. I have ordered a AFM delete cam kit and a programmer. AFM is going away… ...