One problem related to brake master cylinder has been reported for the 2002 Chevrolet Express. The most recently reported issues are listed below.
2002 Chevrolet conversion van Express 1500 had a problem with the drivers side window. Express window would go down but not go back up. The motor was replaced three times, finally the switch was replaced. The brakes and master cylinder had to be replaced. The consumer was told the brakes were insufficient for the weight of the vehicle. The michelin tires only lasted 24,000 miles.