Rear Servo: Disassembly
WARNING: This page does not describe the selected car, but rather 124 other vehicles, including the 1991 Chevrolet Pickup, 1991 Chevrolet Cab & Chassis, 1988 GMC Vandura Special, 1988 GMC Vandura, and 1988 GMC Value Van. However, it is still accessible from the selected car via links, so may be relevant.
Remove rear accumulator piston from rear servo piston. Remove rear servo piston-to-band apply pin "E" clip. Remove seal and rear servo piston from pin. Remove washer, spring and spring retainer.