Simplify the following text for a Grade 11 native English-speaking person.
Original: The Chevrolet Astro is a rear-wheel drive mid-sized van introduced by Chevrolet in 1985 to rival domestic ( American ) competitors the Dodge Caravan\/Plymouth Voyager twins and the Japanese Toyota Van .
Simplified: The Chevrolet Astro is a Minivan that was built by Chevrolet from 1985 to 2005 to rival the Dodge Caravan\/Plymouth Voyager twin models and the Japanese Toyota Van .