Well when you said "recently obtained" I thought
you may have never had dash lights since you got
the trucklet, I think there are 2 bulbs, and you have
to remove the the instrument cluster and find the
bulb holders, they twist 90* and out, to get the cluster
out, remove 4 screws 2 top, 2 under, then the 4 screws
that hold the cluster into the dash, the speedo cable
plugs in and will pull clear, replace bulbs 193s I think
but check first, and put cluster back, click speedo cable
(it's kind of a pain) and replace screws (not too tight or
they will strip the threads)
Good luck,
Wild