Pump Motor Relay & Solenoid Valve Relay
WARNING: This page is about a different car, the 1999 Buick Regal and 1999 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
Pump motor relay and solenoid valve relay are mounted on EBCM/EBTCM and are not serviceable. Relays must be replaced as an assembly with EBCM/EBTCM. See ELECTRONIC BRAKE CONTROL MODULE/ELECTRONIC BRAKE TRACTION CONTROL MODULE (EBCM/EBTCM) & BRAKE PRESSURE MODULATOR VALVE (BPMV) ASSEMBLY .