Disassembly Procedure

Remove the master cylinder from the vehicle. Refer to Master Cylinder Replacement .
Secure the master cylinder in a vise. Do not clamp the master cylinder body, secure only at the flange.

Fig 1: Master Cylinder Reservoir
Courtesy of GENERAL MOTORS CORP.
Carefully tap out the reservoir retaining pins.

Fig 2: Master Cylinder Reservoir Retaining Pins
Courtesy of GENERAL MOTORS CORP.
Remove the reservoir from the master cylinder by pulling the reservoir straight up and away from the cylinder.
Remove the seals from the master cylinder.

Fig 3: Master Cylinder Reservoir Seals
Courtesy of GENERAL MOTORS CORP.