Section 13 (Anti-Lock Brake System - Diesel): Description

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1996 GMC Vandura Special, 1996 GMC Vandura, 1996 GMC Savana Special, 1996 GMC Savana Camper Special, and 1996 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.

The Kelsey-Hayes 4-Wheel Anti-Lock (4WAL) brake system is used to prevent wheel lock-up during heavy braking. This allows driver to maintain steering control while stopping vehicle in shortest distance possible. The system consists of Brake Pressure Modulator Valve (BPMV) or Electro-Hydraulic Control Unit (EHCU), Vehicle Speed Sensor (VSS), VSS buffer, wheel sensors, warning lights, electrical wiring and hydraulic lines.

The BPMV consists of an Electronic Control Unit (ECU), hydraulic control unit, 2 accumulators, pump motor, and relay. The hydraulic control unit consists of an isolation solenoid valve, Pulse-Width Modulated (PWM) valve, a High Pressure Accumulator (HPA), Low Pressure Accumulator (LPA) and a reset switch on each channel. If overhaul or repair to any component on the BPMV is necessary, replace complete assembly.