Master Cylinder Replacement (JH6)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Master Cylinder (JH6, JH7)

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 fluid pressure sensor electrical connector, if equipped.
1	Master Cylinder Fluid Level Sensor 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 32 N.m (24 lb ft)
3	Brake Master Cylinder Nut (Qty: 2) Tighten 36 N.m (27 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 (Pressure) , Hydraulic Brake System Bleeding (Manual) .