Install a camper shell on a truck using six C-clamps to attach it to the bed of the truck, according to DoItYourself.com. Attach one clamp in each corner and one in the center of each of the two longer sides. Test the shell to ensure the clamps attach it firmly.
Depending on the size of the camper shells, they are sometimes very heavy. DoItYourself.com indicates larger shells often require the assistance of one or more helpers to lift the shell and set it in place on the truck. Lowering the tailgate of the truck makes it easier to maneuver the shell into place. The shell should sit squarely on the bed of the truck before the clamps are tightened.
Manufacturers make truck beds in many sizes, making it important to select the correct size, according to DoItYourself.com. Preliminary measurements using a tape measure of the length and width of the camper shell help the truck owner to determine the correct size for the vehicle. Camper shell manufacturers offer light-duty shells for trucks whose owners simply need protection from the weather and heavy-duty shells for trucks that the owner uses for work purposes. Owners should choose the shell that fits their purpose.