Chevrolet 2011 Volt Owner's Manual page 341

There are four points where the
vehicle can be lifted with a
service jack.
When lifting the vehicle from the
rear, place the service jack directly
under the spring seat.
Vehicle Care
When lifting the vehicle from the
front, place the service jack directly
under the cradle mount. Ramps may
be needed under the front tires to
provide the necessary clearance for
certain service jacks in this location.
For more information, see Doing
Your Own Service Work on
page 10 6.
10-5