gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Brakes Grab|Page 7208 > < General Description|Page 7205
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Vacuum Brake Booster: Testing and Inspection
Brakes Grab

1.

Faulty control valve.

2.

Broken or damaged hydraulic brake lines.

3.

Faulty master cylinder seals.

4.

Cracked master cylinder casting.

5.

Air in hydraulic system.

Brakes Grab|Page 7208 > < General Description|Page 7205