Master Cylinder Replacement (Automatic Transmission)

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Master Cylinder (Automatic)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
WARNING: Remove all the air from the hydraulic brake system anytime the hydraulic brake system is opened for repair. The entire bleeding procedure must be followed. Failure to remove all the air in the hydraulic brake system will result in reduced braking performance and possible personal injury. WARNING: Refer to Brake Fluid Irritant Warning . CAUTION: Refer to Brake Fluid Effects on Paint and Electrical Components Caution .
1	Brake Fluid Level Sensor Electrical Connector
2	Brake Pipe Nut (Qty: 2) CAUTION: Refer to Fastener Caution . Tip: Cap or plug the brake pipes to prevent fluid loss and contamination. Bleed the brake system anytime the system is opened for repairs. Refer to Hydraulic Brake System Bleeding (Rear Brake Caliper - Cobalt SS) or Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake System Bleeding (Pressure) . Tighten: 19 N.m (14 lb ft)
3	Master Cylinder Nut (Qty: 2) Tighten: 25 N.m (18 lb ft)
4	Brake Master Cylinder
5	Brake Master Cylinder Seal Tip: If reusing the brake master cylinder, inspect the seal between the master cylinder and booster for damage and replace if necessary. Ensure that the seal is properly seated in the recessed groove on the master cylinder.