Proper service procedure requires that a proportioning valve depressor 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 GM 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 for RWAL).
This tool supersedes Kent Moore No. J-35856.
OTC - SPX