Envoy 4WD V8-5.3L VIN P (2004)
Important: Ensure that the fluid sensor is fully seated before releasing the snap ring.
1. Install the fluid level sensor.
2. Install the electrical connector to the fluid level sensor.
Master Cylinder Overhaul
Master Cylinder Overhaul
Caution: Refer to Brake Fluid irritant Caution in Service Precautions.
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Service Precautions.
Disassembly Procedure
1. Remove the brake master cylinder from the vehicle.
2. Secure the mounting flange of the brake master cylinder in a bench vise so that the rear of the primary piston is accessible.
3. Clean the outside of the master cylinder reservoir on and around the reservoir cap prior to removing the cap and diaphragm.
4. Remove the reservoir cap and diaphragm from the reservoir.
5. Inspect the reservoir cap and diaphragm for the following conditions. If any of these conditions are present, replace the affected components.
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Cuts or cracks
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Nicks or deformation
6. Remove the master cylinder reservoir from the master cylinder.
