Your '07 has both Vehicle Stability Control and Traction Control. Both will apply the antilock braking system selectively if the think the truck is unstable or slipping. It might be some sort of problem with a wheel sensor??
It has been called a lot of things but it is common to all 5.7's. It is more noticeable when the engine is cold, almost like a diesel sound. It mostly goes away when it reaches normal operating temperature. The prevailing theory seems to be that it…