Buick 2014 LaCrosse Owner's Manual page 325

When the compact spare is
installed, do not take the vehicle
through an automatic car wash
with guide rails. The compact
spare can get caught on the rails
which can damage the tire, wheel,
and other parts of the vehicle.
Do not use the compact spare on
other vehicles.
Do not mix the compact spare tire or
wheel with other wheels or tires.
They will not fit. Keep the spare tire
and its wheel together.
Tire chains will not fit the compact
spare. Using them can damage
the vehicle and the chains. Do not
use tire chains on the compact
spare.
If the vehicle fails to crank, it may
be jump started by using the eAssist
battery to charge the 12-volt battery.
Use the following procedure to
activate the on-board jump start
using the DIC controls.
The vehicle may be equipped with
an ignition key or an electronic
keyless ignition with pushbutton
start.
Place the ignition key in the ON/
RUN position and proceed as
follows:
1. Press then scroll
until the Settings menu displays.
2. Press to enter the
Settings menu.
or