Sure...it's done via the Vehicle Personalization menu...
Here is a link to the Online Owner Manual...see section 5 page 34...
which states...
http://www.chevrolet.com/assets/pdf/owners/manuals/2011/2011_chevrolet_equinox_owners.pdf
Remote Door Unlock
This allows selection of which doors
will unlock when pressing the unlock
button on the RKE transmitter.
Press the MENU/SELECT knob
when “Remote Door Unlock” is
highlighted. Turn the knob to select
“All Doors” or “Driver Door.” Press
the knob to confirm and go back to
the last menu.
Here is a link to the Online Owner Manual...see section 5 page 34...
which states...
http://www.chevrolet.com/assets/pdf/owners/manuals/2011/2011_chevrolet_equinox_owners.pdf
Remote Door Unlock
This allows selection of which doors
will unlock when pressing the unlock
button on the RKE transmitter.
Press the MENU/SELECT knob
when “Remote Door Unlock” is
highlighted. Turn the knob to select
“All Doors” or “Driver Door.” Press
the knob to confirm and go back to
the last menu.