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; Low Profile;
2019-2021 Chevrolet Silverado 2500 HD Retrax - GatorTrax Tonnopro - Lo Roll RTX - Hard Fold Access - Lorado Retrax - RetraxOne MX Trail FX - Hard Tri Fold Access - Tonnosport Retrax - PowertraxONE MX Trail FX - Soft Rolling Access - Vanish Retrax - RetraxPRO MX Trail FX - Soft Tri Fold American Tonneau - Soft Rolling Retrax - PowertraxPRO MX Truxedo - Edge Truxedo - Lo Pro Bak Industries - Revolver X2 Retrax - RetraxONE XR Undercover - Flex Enthuze - R-Series Retrax - PowertraxONE XR Extang - Revolution Enthuze - Soft Roll Retrax - RetraxPRO XR Extang - Xceed Hard Fold Gator - Evo Retrax - PowertraxPRO XR Bak Industries - BakFlip G2 Gator - FX Truxedo - ProX15 Bak Industries - BakFlip MX4 Gator - FX3 Truxedo - Sentry Bak Industries - Fibermax Gator - FX5 Truxedo - Sentry CT Bak Industries - BakFlip F1 Gator - Roll Up Series UnderCover - Ultra Flex Bak Industries - Revolver X4 Gator - Trax UnderCover - ArmorFlex Enthuze - Hard Tri-Fold Low Profile Ionic - Roll Up ARE - Fusion Gator - EFX Lund - Genesis Roll Up RTX - Soft Roll ...See Application Guide for Additional Fitments

Fitment:
Chevrolet Silverado 2500 HD Custom 2020
Chevrolet Silverado 2500 HD Custom 2021
Chevrolet Silverado 2500 HD High Country 2019
Chevrolet Silverado 2500 HD High Country 2020
Chevrolet Silverado 2500 HD High Country 2021
Chevrolet Silverado 2500 HD LT 2019
Chevrolet Silverado 2500 HD LT 2020
Chevrolet Silverado 2500 HD LT 2021
Chevrolet Silverado 2500 HD LTZ 2019
Chevrolet Silverado 2500 HD LTZ 2020
Chevrolet Silverado 2500 HD LTZ 2021
Chevrolet Silverado 2500 HD WT 2019
Chevrolet Silverado 2500 HD WT 2020
Chevrolet Silverado 2500 HD WT 2021
Chevrolet Silverado 3500 HD High Country 2019
Chevrolet Silverado 3500 HD High Country 2020
Chevrolet Silverado 3500 HD High Country 2021
Chevrolet Silverado 3500 HD LT 2019
Chevrolet Silverado 3500 HD LT 2020
Chevrolet Silverado 3500 HD LT 2021
Chevrolet Silverado 3500 HD LTZ 2019
Chevrolet Silverado 3500 HD LTZ 2020
Chevrolet Silverado 3500 HD LTZ 2021
Chevrolet Silverado 3500 HD WT 2019
Chevrolet Silverado 3500 HD WT 2020
Chevrolet Silverado 3500 HD WT 2021
GMC Sierra 2500 HD Base 2019
GMC Sierra 2500 HD Base 2020
GMC Sierra 2500 HD Base 2021
GMC Sierra 2500 HD Denali 2019
GMC Sierra 2500 HD Denali 2020
GMC Sierra 2500 HD Denali 2021
GMC Sierra 2500 HD SLE 2019
GMC Sierra 2500 HD SLE 2020
GMC Sierra 2500 HD SLE 2021
GMC Sierra 2500 HD SLT 2019
GMC Sierra 2500 HD SLT 2020
GMC Sierra 2500 HD SLT 2021
GMC Sierra 3500 HD Base 2019
GMC Sierra 3500 HD Base 2020
GMC Sierra 3500 HD Base 2021
GMC Sierra 3500 HD Denali 2019
GMC Sierra 3500 HD Denali 2020
GMC Sierra 3500 HD Denali 2021
GMC Sierra 3500 HD SLE 2019
GMC Sierra 3500 HD SLE 2020
GMC Sierra 3500 HD SLE 2021
GMC Sierra 3500 HD SLT 2019
GMC Sierra 3500 HD SLT 2020
GMC Sierra 3500 HD SLT 2021