The PowerStop Evolution drilled and slotted rotor for 1991 GMC Sonoma (front left) is a replacement front-left rotor with drilled and slotted friction surfaces intended to help disperse heat and clear pad deposits. It matches the front-left position indicated in the listing. This rotor is intended for use when replacing a worn or damaged front-left rotor on 1991 GMC Sonoma applications.
Power Stop 1991 GMC Sonoma Front Left Evolution Drilled & Slotted Rotor