One problem related to brake disc caliper has been reported for the 2003 Chevrolet Astro. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Astro based on all problems reported for the 2003 Astro.
Uneven wear of brake rotors due to frozen calipers. Rotor becomes unevenly worn causing a pulse in brakes and reducing the effectiveness of the brakes. When examined further it is apparent that the caliper is not sliding properly and only the piston side of the brake system is being applied aggravating the problem further. Problem was a primary cause for loss of control in a low traction incident in which the van spun during panic braking when one rear wheel locked and the other didn't. The vehicle has been back to the dealership several times for brake problems and each time the vehicle was returned only to redevelop problems within a month or two. Dealer serviced vehicle one time as warranty but required payment for pads even though the premature wear was caused by this problem. This van is advertised with a towing capacity of 5000 lbs I would be scared to see what would happen if the problem manifested itself while towing a 5000lb trailer down a hill or moutain side.