Sierra 1500 2WD V6-4.3L (2008)
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.
13. Inspect the power brake booster for any leaks
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.
14. If the power brake booster is leaking, replace the power brake booster. Refer to Power Brake Booster Replacement (Adjustable Pedals) (See:
Removal and Replacement/Power Brake Booster Replacement (Adjustable Pedals))Power Brake Booster Replacement (Non-Adjustable Pedals) (
See: Removal and Replacement/Power Brake Booster Replacement (Non-Adjustable Pedals)) .
15. If brake fluid is leaking, refer to Brake Fluid Loss (See: Hydraulic System/Testing and Inspection/Symptom Related Diagnostic Procedures/Brake
Fluid Loss) for additional diagnostics.
