Master Cylinder Replacement (Automatic)

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 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
CAUTION: 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. CAUTION: Refer to Brake Fluid Irritant Caution . NOTE: Refer to Brake Fluid Effects on Paint and Electrical Components Notice . NOTE: Refer to Fastener Notice . Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
1	Connector, Brake Fluid Level Sensor Electrical
2	Nut, Brake Pipe (Qty: 2) 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 (Manual) or Hydraulic Brake System Bleeding (Pressure) . Tighten: 19 N.m (14 lb ft)
3	Nut, Master Cylinder (Qty: 2) Tighten: 25 N.m (18 lb ft)
4	Cylinder, Brake Master
5	Seal, Brake Master Cylinder 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.