Power Brake Unit: Removal
WARNING: This page is about a different car, the 2000 Isuzu Hombre and 1999 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect negative battery cable. Disconnect master cylinder from power brake unit and position aside. Disconnect vacuum hose. Disconnect push rod from brake pedal. From inside vehicle, remove power brake unit-to-firewall nuts. Remove power brake unit.