The truck was pulled over on Sunday morning and the driver, who was accompanied by a minor, was arrested.
Police sent a bomb-detecting robot to the white truck, parked beside a road in Lebanon, 30 miles from Nashville.
But the search revealed there was no dangerous material or explosives inside the truck, according to Nashville’s Fox17.
On Christmas Day a recreational vehicle (RV) in Nashville exploded in what police believe may have been an elaborate suicide.
On Sunday, Nashville police confirmed that they believe a local IT expert, Anthony Quinn Warner, 63, detonated the truck, likely with himself inside. Human remains were found on the scene and a DNA test is being carried out.
The motive remains unclear.