2008 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 354

Two-Tiered Loading Depending on the model of your pick-up, you can create an upper load platform by positioning two or four 2 inches (5 cm) by 6 inches (15 cm) wooden planks across the width of the pickup box. The planks must be inserted in the pickup box depressions. The length of the planks must allow for at least a 3/4 inch (2 cm) bearing surface on each end of the plank. When using this upper load platform, be sure the load is securely tied down to prevent it from shifting. The load's center of gravity should be positioned in a zone over the rear axle. The zone is located in the area between the front of each wheel well and the rear of each wheel well. The center of gravity height must not extend above the top of the pickup box flareboard. Any load that extends beyond the vehicle's taillamp area must be properly marked according to local laws and regulations. Remember not to exceed the Gross Axle Weight Rating (GAWR) of the front or rear axle. Add-On Equipment When you carry removable items, you may need to put a limit on how many people you carry inside your vehicle. Be sure to weigh your vehicle before you buy and install the new equipment. Notice: Overloading your vehicle may cause damage. Repairs would not be covered by your warranty. Do not overload your vehicle. Remember not to exceed the Gross Axle Weight Rating (GAWR) of the front or rear axle. * Equipment Ladder Rack and Cargo Cross Toolbox and Cargo Side Boxes and Cargo Maximum Weight 750 lbs (340 kg) 400 lbs (181 kg) 250 lbs per side (113 kg per side) * The combined weight for all rail-mounted equipment should not exceed 1,000 lbs (454 kg). 4-42