1995 K1500
hey guys my pickup is acting up , for the past couple months when gas is applied, and only when gas is applied i have a loud humming noise that smoothes out the faster i go, but doesnt start until i hit 25 mph no matter what gear im in , as soon as i let of the gas it goes away, front cv shafts are good, u joints are good, rear pinion bearing has no play in it. Im stumped, help would be appreciatted
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