Removal & Installation
On Oldsmobile and Cadillac, disconnect and plug hydraulic lines at master cylinder. On Buick, Chevrolet, and Pontiac, disconnect master cylinder from power unit and place out of way (with hydraulic lines still attached). On all models, disconnect vacuum line from check valve. On Pontiac, remove check valve from power unit. Detach push rod from brake pedal.
NOTE:
On Cadillac, lower steering column cover must first be removed. On Chevelle and Monte Carlo, unbolt power unit and depress brake pedal to move unit from firewall and gain access to push rod pin.
Unbolt and remove power unit, To install, reverse removal procedure and bleed system.