Removal & Installation
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1990 Pontiac Bonneville, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, 1990 Cadillac Fleetwood, and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect negative battery cable. Depressurize brake system. Remove fluid from reservoir. Remove hydraulic unit. Remove 3 nuts and washers. Remove valve block assembly and "O" rings. See Figure . To install, reverse removal procedure. Inspect "O" rings and replace if necessary. See BLEEDING BRAKE SYSTEM .