BACKRACK Tonneau Hardware Kit; Low Profile; 20-24 Silverado/Sierra HD Model 40124 69" Class 4 receivers

Class 4 receivers

1979-1986 GMC K3500

Part Number 77-50112BW Rated line pull 3500 lbs (1588 kg) Single Line Gear Train 3 Stage Planetary Gear Ratio 242:1 Motor Permanent Magnet

This makes it easy to open a hatchback door or trunk and access the r ear cargo area

BACKRACK Tonneau Hardware Kit; Low Profile; 20-24 Silverado/Sierra HD Model 40124 69" Class 4 receiversBACKRACK Tonneau Hardware Kit; Low Profile; 20 24 Silverado Sierra HD Model 40124 Replaces Standard Railmount Hardware. Allows Toolbox to be installed flush against BackRack(TM). Eliminates gap between Toolbox and Backrack. Allows Toolbox to be installed without drilling into truck bed. Standard 21 inches. Optional 31 inches available. Tonneau Cover Hardware Kit Fitment Information 2020 2024 Chevrolet Silverado 2500 HD, 2020 2024 Chevrolet Silverado