Master Cylinder Replacement (Hydraulic Assist)

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Master Cylinder (Hydraulic Assist)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
WARNING: Refer to Brake Fluid Irritant Warning . CAUTION: Refer to Brake Fluid Effects on Paint and Electrical Components Caution . Preliminary Procedures Using a suitable tool, remove the brake fluid from the brake master cylinder reservoir. Discard the brake fluid into an approved container. Disconnect the brake master cylinder pressure sensor electrical connector, if equipped.
1	Brake Fluid Level Indicator Switch Electrical Connector
2	Brake Pipe Fitting (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure Remove any dirt or debris from the brake pipe fitting. Cap the brake pipe fittings to prevent brake fluid loss and contamination. Tighten: With JL4: 32 N.m (24 lb ft) Tighten: Without JL4: 25 N.m (18 lb ft)
3	Brake Master Cylinder Nut (Qty: 2) Tighten: 33 N.m (24 lb ft)
4	Brake Master Cylinder Assembly Procedure Remove and discard the push-on nuts on the master cylinder mounting studs, if equipped. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake System Bleeding (Pressure) or Hydraulic Brake System Bleeding (Two-mode Hybrid) .