1999-07 Chevy Silverado and GMC Sierra 4DR Ext. Cab Outer Rocker Panels (Pair) Replaces Outer Rocker Sections For 1999-07 Chevy Silverado and GMC Sierra 4DR Ext. Cab Made from 18ga automotive steel for extra durability Made by the most trusted manufacturer of rust repair panels Made in the USA Replace's Passenger Side and Driver Side