The rear bumper of a Chevy Astro Van (which is also known as the bumper cover), is a part made of plastic, mounted on the inferior rear area of a car. For your Chevy, there are a lot of aftermarket options for your Astro Van rear bumper. Nowadays, the Chevy Astro van rear bumper is available in numerous different designs and styles. The material used to make rear bumpers is generally ABS plastic, carbon fiber or fiber glass, out of which the Astro Van urethane replacement rear bumper is most recommended.