Fitting kit required for perfect fit of the roof rack to a specific car. Compatible vehicles: Model number 4041 Cadillac: Escalade 5-dr SUV with Flush Rails 2015 - 2020, Escalade ESV 5-dr SUV with Flush Rails 2015 - 2020 Chevrolet:: Suburban 5-dr SUV with Flush Rails 2015 - 2020, Tahoe 4-dr SUV with Flush Rails 2015 - 2020, Suburban Z71 5-dr SUV with Flush Rails 2015 - 2020 GMC: Yukon Denali 5-dr SUV with Flush Rails 2015 - 2020, Yukon Denali XL 5-dr SUV with Flush Rails 2015 - 2020, Yukon XL 4-dr SUV with Flush Rails 2015 - 2020, Yukon 4-dr SUV with Flush Rails 2015 - 2020