A shelving and package locating system for delivery vehicles includes one or more shelves for storing packages within a delivery vehicle during delivery. Each package is associated with both a geographic delivery address and an assigned location on a particular shelf within the delivery vehicle. A GPS unit determines the location of the delivery vehicle during delivery, and a computer provides the shelf location of a particular package when that package's delivery-location information substantially corresponds to vehicle location information. Several embodiments exist for registering the location of the package in the vehicle at load time, such as scanned location indicia, light sensors on shelves, pressure sensors on shelves, pressure sensors on the floor of the vehicle, and light spot. Several embodiments exist for locating the package in the vehicle at delivery time, such as a pick-to-light system that employs variable length lighting and a light pointer system that generates a light spot.