I had earlier commented on a vibrating fuel line noise (rattle), that was quieted by dealer 'tying it off' under the driver's seat. Source of resonant vibration noise at approx. 1,700 and 2,500 rpm at moderate throttle in the lower gears, appears to be from the torque convertor area of engine...
Guys, could be what I have... a noisy high pressure fuel pump that causes things to resonate along the supply fuel line to the back of truck. The mechanic got rid of a shield rattle from it that was under/behind the driver's seat, but the buzz of the pump is still there and annoying. It happens...
Just got mine back from the dealer for rpm induced noise just before shift points in lower gears. They found the H. P. fuel pump is inducing a resonance in the fuel supply line under the truck and vibrating a shield. They tied the shield off so the rattle is gone but the pump's buzz/humm is...