2004 GMC Sierra 1500 Pickup Owner's Manual - Page 359

Payload Payload capacity is the maximum load capacity that your vehicle can carry. Be sure to include the weight of the occupants as part of your load. If you added any accessories or equipment after your vehicle left the factory, remember to subtract the weight of these things from the payload. Your dealer can help you with this. Remember not to exceed the Gross Axle Weight Rating (GAWR) of the front or rear axle. 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. Two-Tiered Loading By positioning four 2" x 6" wooden planks across the width of the pickup box, you can create an upper load platform. 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. 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) excludes 1500 crew cab models with 5' 8″ box length. A reinforcement kit for rail-mounted add-on equipment is recommended. See your dealer. Ladder racks are not recommended for 1500 crew cab models (with 5' 8″ pick-up box length.) Maximum recommended cross mounted toolbox and cargo weight is 300 lbs. (136 kg) for the 1500 crew cab (with 5' 8″ pick-up box length.) 4-63