Proportioning Valve Depressor forABS Brake Systems: H

7853 Proportioning Valve Depressor for ABS Brake Systems Features and Benefits: Proper service procedure requires that a proportioning valve depressor be installed on the 4WAL unit when pressure bleeding the brake system.For best results on 4WAL, use two of these depressors, one for each valve. Services a wide variety of General Motors utility vehicles, vans, and pickups with Kelsey Hayes anti-lock brake systems. Also works on RWAL systems and must be installed on the proportioning valve (only one depressor required)