Up for sale is a good functional Nissan Dash dimmer switch. This is the unit that dims the gauge cluster lights, located to the left and down of the gauge cluster. These are reasonable easy to exchange.  Compare these pictures carefully with your original.  Many many Nissans used this dimmer switch.  You'll find them in Sentra 240SX Maxima Altima, Pathfinder, and possibly more.  Please note!  Nissan used a couple different dimmer switch's over the years that have a similar appearance to this unit but have different connectors.  This is the 3 wire connector.  Please see pictures of the back of this unit and compare it to the back if your switch to be SURE of fitment.  

Pop it out, and plug in the new one. Please compare the picture of this unit with your original.  I have tested this unit for correct resistance with an ohm meter and it works properly through it's working range. It will come to you as seen. this good used unit is less than 1/7 the new part price!  Keep your Truck going!