One problem related to brake light has been reported for the 1999 Chevrolet Express 1500. The most recently reported issues are listed below.
1999 chevy express van. Right and left brake lights fail to operate correctly. Application of brakes causes brake light to dim instead of getting brighter. Problem observed in many chevy express vans with identical tail lights. Problem traced to corroded ground connection in both tail light/brake light bulb sockets. Advance auto parts and napa sell replacement wiring harnesses that includes all three bulb sockets. Advance auto parts unit must have the connector reconfigured to match the factory body connector.