Where to Install Gasket When Installing Thule Wingbar on 2021 Chevy Silverado 1500

Updated 07/22/2026 | Published 07/18/2026

Products Featured in This Question

Thule WingBar Evo Roof Rack for Naked Roofs - Aluminum - Black - Qty 2

(164311)

$704.85

Fit Kit for Thule Evo Clamp and Edge Clamp Roof Rack Feet - 5071

(483)

$159.95

Question:

I am installing the evo clamp feet with evo wingbar on my 2021 Silverado 1500. The fit kit comes with a long thin rubber gasket that fits under the clamp somewhere in the doors grooves, under the gasket - but where?? The directions show 2 different locations page 4 of the kit 145071 directions - one picture shows the top groove in the door, and another picture shows a lower groove. Picture only directions are not great. Your videos are nice - but neither video for the Chevy install showed this gasket being installed at all.

asked by: Tw

Expert Reply:

Hey Tw, I see what you mean with the gasket for the install of the fit kit part # TH145071. I attached a picture that shows where it is installed and I would use the location that is in the A and C locations when installing the kit part # TH23KG on your 2021 Chevy Silverado 1500.

expert reply by: Jameson C