Howdy, ADHelms, and welcome to the forum.
Taking a shot in the dark here with an educated guess. I have the same truck as you, white of course, and the only thing I can think of is that perhaps you didn't put in OEM plugs and the engine is using more gas to get the same spark. And with more gas comes more air. So what you're actually hearing is the intake sucking in more air to compensate for more gas, which would explain the reduction in performance. If the plugs are not OEM, put some OEM plugs in and see if that fixes it. Let us know how it turns out or if we can help you further. There's bound to be a few others chime in with their two cents.
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