Originally Posted By: AU338MAG
Damned active fuel management system. All of the 07-09 GM 5.3 models end up in this situation.

Thats exactly what caused the damage to my Silverado.
I had that schit deleted when we replaced the cam.
I always hated it anyway. I bought 8 cylinders, I want it to run on 8 cylinders, ALL THE TIME!

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