Sierra Classic 2500 4WD V8-6.0L (2007)
13. Important: On low mileage vehicles, at joint between the power brake booster housing and end cap 1, light moisture is acceptable. If fluid
droplets develop, the power brake booster must be replaced.
Inspect the power brake booster for any leaks
14. Important: A leak between the power steering brake booster 2 and the master cylinder is not acceptable. If a leak is present, the type of fluid
must be determined. Power steering fluid indicates that the power brake booster needs to be replaced. Brake fluid indicates an issue with the brake
master cylinder.
If the power brake booster is leaking, replace the power brake booster. Refer to Power Brake Booster Replacement.
15. If brake fluid is leaking, refer to Brake Fluid Loss for additional diagnostics. See: Hydraulic System/Testing and Inspection/Symptom Related
Diagnostic Procedures/Brake Fluid Loss
