its an 81 and up model, if you could find a pic of the grill it would help us more to find out what year, but to me it looks like and mid 80's truck because of the trim behind the cab and the light on top of the cab. if it has 2 headlights and the turn signals in the front bumper then its an early 80's truck but if its got 4 headlights and turn signals in the grills its a mid - late 80's truck. also it appears to be a silverado.
-Nic