Try turning your radio off, rolling the windows down get off the highway and see if the sound you heard is the same as you were hearing!!! The whining sound is the restriction of exhuast gases in the turbo..
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2007.5 Mineral Grey & Light Silver, 6.7L, Auto, Quadcab, 4x4, 4.10, Laremie, Intake Baffle MIA, Tinted Windows, B&W turnover ball, with more addons in the works