To open the hood:
It is located below the instrument panel to the left of the steering wheel.
To close the hood:
Chevrolet Captiva Owners Manual > Keys and Locks: Delayed Locking, Automatic Door Locks, Lockout Protection
Delayed Locking
A chime will sound to indicate a door or the liftgate is open when you try to lock the doors with the power door lock switch. The doors will not lock, and the theft‐deterrent system will not arm until all the doors are closed and five seconds have passed.
Automatic Door Lock
...