Fitment: These rocker panels compatible with 1999-2006 Chevy Silverado GMC Sierra 4 Door Crew Cab and 2007 Chevrolet GMC Pickup Classic 4 Door Crew Cab. Only fit for 1st-generation Silverado(GMT800), 2nd-generation Sierra. Not Fit For extended cab/double cab. Please check your vehicle's model and year before purchasing Condition: Material:Steel; Color:Black; Location:Driver & Passenger side; Surface Finish:Electrophoresis Feature: Made of high quality steel, high strength and durable, provide certain protection for vehicles from collisions and scratches Package Include: 1 set of rocker panels.( driver and passenger side). No instruction. You will receive two packages Installation: Weld on directly. Professional installation is highly recommended Fitment: These rocker panels compatible with 1999-2006 Chevy Silverado GMC Sierra 4 Door Crew Cab and 2007 Chevrolet GMC Pickup Classic 4 Door Crew Cab. Only fit for 1st-generation Silverado(GMT800), 2nd-generation Sierra. Not Fit For extended cab/double cab. Please check your vehicle's model and year before purchasing Condition: Material:Steel; Color:Black; Location:Driver & Passenger side; Surface Finish:Electrophoresis. Feature: Made of high quality steel, high strength and durable, provide certain protection for vehicles from collisions and scratches. Package Include: 1 set of rocker panels.( driver and passenger side). No instruction. You will receive two packages. Installation: Weld on directly. Professional installation is highly recommended.