2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 416

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 the vehicle may cause Loading Points damage. Repairs would not be covered by the vehicle warranty. Do not overload the 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) A. Primary Load Points B. Secondary Load Areas C. Cargo Management Option Holes Structural members (A) and (B) are included in the pick-up box design. Additional accessories should use these load points. Depending on the accessory design, use a spacer under the accessory at the load points to remove gap. The holes for the Cargo Management System (C) are not intended for attachment of 250 lbs per side (113 kg per side) * The combined weight for all rail‐mounted equipment should not exceed 1,000 lbs (454 kg). 5-40