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; Wide Top;
2019-2021 Chevrolet Silverado 1500 Tonnopro - Hard Fold American Tonneau - Hard Tri Fold Tonnopro - Tonno Fold American Tonneau - Soft Tri Fold Trail FX - Soft Tri Fold BesTop - EZ Fold Extang - Trifecta ALX Enthuze - Hard Tri-Fold RTX - Soft Fold Enthuze - R-Series Enthuze - Hard Tri-Fold Wide Top Enthuze - Soft Tri-Fold Extang - Solid Fold Extang - Trifecta Gator - Hybrid Gator - Soft Tri Fold Ionic - Tri Fold Lund - Genesis Tri Fold Pro EFX - Tri Fold Rugged Cover - E Series Vinyl Folding Rugged Cover - Hard Folding Rugged Cover - Premium Vinyl Folding Advantage Truck Acc - Hard Hat, 2019-2021 Chevrolet Silverado 1500 Tonnopro - Hard Fold American Tonneau - Hard Tri Fold Tonnopro - Tonno Fold American Tonneau - Soft Tri Fold Trail FX - Soft Tri Fold BesTop - EZ Fold Extang - Trifecta ALX Enthuze - Hard Tri-Fold RTX - Soft Fold Enthuze - R-Series Enthuze - Hard Tri-Fold Wide Top Enthuze - Soft Tri-Fold Extang - Solid Fold Extang - Trifecta Gator - Hybrid Gator - Soft Tri Fold Ionic - Tri Fold Lund - Genesis Tri Fold Pro EFX - Tri Fold Rugged Cover - E Series Vinyl Folding Rugged Cover - Hard Folding Rugged Cover - Premium Vinyl Folding Advantage Truck Acc - Hard Hat, 2019-2021 GMC Sierra 1500 Tonnopro - Hard Fold American Tonneau - Hard Tri Fold Tonnopro - Tonno Fold American Tonneau - Soft Tri Fold Trail FX - Soft Tri Fold BesTop - EZ Fold Extang - Trifecta ALX Enthuze - Hard Tri-Fold RTX - Soft Fold Enthuze - R-Series Enthuze - Hard Tri-Fold Wide Top Enthuze - Soft Tri-Fold Extang - Solid Fold Extang - Trifecta Gator - Hybrid Gator - Soft Tri Fold Ionic - Tri Fold Lund - Genesis Tri Fold Pro EFX - Tri Fold Rugged Cover - E Series Vinyl Folding Rugged Cover - Hard Folding Rugged Cover - Premium Vinyl Folding Advantage Truck Acc - Hard Hat ...See Application Guide for Additional Fitments

Fitment:
Chevrolet Silverado 1500 Custom 2019
Chevrolet Silverado 1500 Custom 2020
Chevrolet Silverado 1500 Custom 2021
Chevrolet Silverado 1500 High Country 2019
Chevrolet Silverado 1500 High Country 2020
Chevrolet Silverado 1500 High Country 2021
Chevrolet Silverado 1500 LT 2019
Chevrolet Silverado 1500 LT 2020
Chevrolet Silverado 1500 LT 2021
Chevrolet Silverado 1500 LTZ 2019
Chevrolet Silverado 1500 LTZ 2020
Chevrolet Silverado 1500 LTZ 2021
Chevrolet Silverado 1500 SSV 2019
Chevrolet Silverado 1500 SSV 2020
Chevrolet Silverado 1500 SSV 2021
Chevrolet Silverado 1500 WT 2019
Chevrolet Silverado 1500 WT 2020
Chevrolet Silverado 1500 WT 2021
GMC Sierra 1500 Base 2019
GMC Sierra 1500 Base 2020
GMC Sierra 1500 Base 2021
GMC Sierra 1500 Denali 2019
GMC Sierra 1500 Denali 2020
GMC Sierra 1500 Denali 2021
GMC Sierra 1500 SLE 2019
GMC Sierra 1500 SLE 2020
GMC Sierra 1500 SLE 2021
GMC Sierra 1500 SLT 2019
GMC Sierra 1500 SLT 2020
GMC Sierra 1500 SLT 2021