Abstract: An auxiliary tailgate apparatus is adapted for installation on an original tailgate and includes a base assembly adapted to be attached to the original tailgate. A gate assembly includes a proximal end and a distal end. A pair of pivot assemblies connect the proximal end of the gate assembly with the base assembly. A first lock assembly, supported by either the gate assembly or the base assembly, is provided for selectively locking the gate assembly in a vertical orientation with respect to the base assembly or selectively permitting the gate assembly to rotate around the pivot assemblies for permitting the gate assembly to be oriented in a non-vertical orientation with respect to the base assembly. When the first lock assembly is supported by the base assembly, the first lock assembly includes a lock pin assembly which includes a pin member adapted to be placed in registration with a locking well located in the gate assembly for locking the gate assembly in a vertical orientation.