This was an enjoyable father-son project made in a driveway using simple tools(hand drill, jigsaw, and circular saw).
We used a Pocket Hole Jig and created a face for the shelving using a single sheet of plywood to get that clean look.

The cost of materials was about $320.

Truck: 2017 Chevrolet Silverado 1500, Double Cab, LT, 6'6" Bed
Cap: Leer 122

Work to be done; cover window, cover safe, add carpet, add lights