Hi.
If you get down under the front of the passenger side front wheel, you will find it stamped into the chassis rail in the section between the plate with the winch cable guides and the support bracket with the 3 bolt heads shown in the pic below. It can be pretty faint on some, but should start with 4X4. In the pic below, the letters are about 25mm high, but you still need to zoom right in to make them out.
Greg.