The Chevy Avalanche side skirts are the add-on devices that are mounted on the sides of your car. They are mounted on the lower portion of the car and are great for attaining a sporty appearance. The Chevy Avalanche side skirt basically refers to strips made of carbon fiber, fiberglass, or ABS plastic, which make your car appear much lower than it actually is. The installation, fixing and bolting of these side skirts is very simple and easy. The Chevy Avalanche side skirts are often used along with the rear or/and front bumpers that are available in the market.