One problem related to brake loud noise has been reported for the 1997 Chevrolet Astro. The most recently reported issues are listed below.
Abs brakes seem to kick in at low speeds. Can feel the brake pedal pulsating. Would make loud noises when brakes are applied. On its own the abs brakes would engage & then disengage. Problem is intermittent & cannot be duplicated. Have taken vehicle to dealership & mechanic has test driven vehicle to apply brakes, but the problem was never solved.