Rocker Panel Compatibility: Compatible with 1999-2006 Chevy Chevrolet Silverado GMC Sierra 1500 2500 3500 Pickup, 2007 Chevy Chevrolet Silverado GMC Sierra 1500 2500 3500 Classic Pickup. Cab Corner Compatibility: Compatible with 1999-2007 Chevy Chevrolet Silverado GMC Sierra 1500 2500 3500 Pickup. Replace for part number 0856-115, 0856-116. Robust Structure: Our rocker panel is made of heavy-duty steel for high impact resistance and durability. Surface electrophoresis treatment effectively extends the life of the rocker panel and can withstand high intensity use. Protect Interior: They protect the sides of the vehicle from road gravel, mud or other debris. When the vehicle is driving on uneven or unpaved roads, these rocker panels can prevent splashes from hitting the body directly, reducing scratches and damage. Package Included: ONLY 1 pair x rocker panels, 1 pair x cab corners (driver & passenger side, 3 Packages). No instructions or mounting hardware. Requires proper welding for installation, we recommend that you seek the help of a professional technician. Rocker Panel Compatibility: Compatible with 1999-2006 Chevy Chevrolet Silverado GMC Sierra 1500 2500 3500 Pickup, 2007 Chevy Chevrolet Silverado GMC Sierra 1500 2500 3500 Classic Pickup. Cab Corner Compatibility: Compatible with 1999-2007 Chevy Chevrolet Silverado GMC Sierra 1500 2500 3500 Pickup. Replace for part number 0856-115, 0856-116. Robust Structure: Our rocker panel is made of heavy-duty steel for high impact resistance and durability. Surface electrophoresis treatment effectively extends the life of the rocker panel and can withstand high intensity use. Protect Interior: They protect the sides of the vehicle from road gravel, mud or other debris. When the vehicle is driving on uneven or unpaved roads, these rocker panels can prevent splashes from hitting the body directly, reducing scratches and damage. Package Included: ONLY 1 pair x rocker panels, 1 pair x cab corners (driver & passenger side, 3 Packages). No instructions or mounting hardware. Requires proper welding for installation, we recommend that you seek the help of a professional technician.