To open the hood:
It is located below the instrument panel to the left of the steering wheel.
To close the hood:
Chevrolet Captiva Service & Repair Manual > Brakes: Brake Master Cylinder R&R
Removal
1.
Using a suitable tool, remove the brake
fluid from the brake master cylinder reservoir.
2.
Discard the brake fluid into an approved
container.
3.
Remove the underhood electrical center.
...