Chevrolet 2013 VOLT Owner's Manual page 206

10-4 Vehicle Care
3. Go to the front of the vehicle and
locate the secondary release
lever under the front centre of
the bonnet. Push the secondary
bonnet release lever to the right
to disengage.
4. Lift the bonnet and release the
bonnet prop rod from its retainer
above the radiator support.
Place the prop rod securely into
the slotted retainer in the
bonnet.
To close the bonnet:
1. Before closing the bonnet, check
that all filler caps are properly
installed. Then, lift the bonnet to
relieve pressure on the
bonnet prop.
2. Remove the bonnet prop from
the slotted retainer in the bonnet
and return it to its retainer above
the radiator support. The prop
rod must lock into place when
returning it to the retainer to
prevent bonnet damage.
3. Lower the bonnet 20 cm (8 in)
above the vehicle and release it
so it fully latches. Check to
make sure the bonnet is firmly
closed. Repeat the process if
necessary.