Cadillac 2010 CTS Sport Sedan Owner's Manual page 404

2. Get the vehicles close enough
so the jumper cables can reach,
but be sure the vehicles are not
touching each other. If they are,
it could cause a ground
connection you do not want.
You would not be able to start
your vehicle and the bad
grounding could damage the
electrical systems.
To avoid the possibility of the
vehicles rolling, set the parking
brake firmly on both vehicles
involved in the jump start
procedure. Put an automatic
transmission in P (Park) or a
manual transmission in Neutral
before setting the parking brake.
3. Turn off the ignition on both
vehicles. Unplug unnecessary
accessories plugged into the
cigarette lighter or the accessory
power outlets. Turn off the radio
and all lamps that are not
needed. This will avoid sparks
and help save both batteries.
And it could save the radio!
4. Open the hoods and locate the
positive (+) and negative ( )
terminal locations or the remote
positive (+) and remote
negative ( ) terminals of the
other vehicle. Then locate the
remote positive (+) location on
your vehicle. See
for more information
on locations the terminals.
Your vehicle has a remote
negative ( ) ground location, as
shown in the illustration. It is
located on the rear passenger
side of the vehicle . See
. You should always
use this remote ground location,
instead of the terminal on the
battery.