Open the glove box and let the squirrel out!!
Under the vehicle, behind the driver.
under the pickup in the center of the engine block
under the dash on the passenger side.
Under dash, left side.
under drivers side seat. under the truck.
It is under the dash where the passagers feet go.
Usually passenger side, under the dashboard.
Could be motor mounts or transmission. You could check them by usesing pray bar on all the mounts to see if there broken.
under the dash passenger middle ish
under the battery or close by
Probly under the drivers door on the inside of the frame.
Warped rotors is the most likely cause. Seek professional help.