Cadillac 2016 XTS Owner's Manual page 315

314 Vehicle Care
The vehicle has a remote
positive (+) terminal under a trim
cover. It is under the battery cover
on the driver side of the engine
compartment. See Engine
Compartment Overview 0 246.
Always use this remote positive
terminal.
The vehicle has a remote negative
( ) ground location. It is located on
the driver side of the engine
compartment. See Engine
Compartment Overview 0 246.
Always use this remote ground
location, instead of the terminal on
the battery.
These posts are used instead of a
direct connection to the battery.
1. Check the other vehicle.
It must have a 12-volt battery
with a negative ground system.
Caution
If the other vehicle does not have
a 12-volt system with a negative
ground, both vehicles can be
damaged. Only use a vehicle that
has a 12-volt system with a
negative ground for jump starting.
2. Position the two vehicles so
that they are not touching.
3. Set the parking brake firmly.
Vehicles with an automatic
transmission should be in
P (Park). See Shifting Into Park
0 195.
Caution
If any accessories are left on or
plugged in during the jump
starting procedure, they could be
damaged. The repairs would not
be covered by the vehicle
warranty. Whenever possible, turn
off or unplug all accessories on
either vehicle when jump starting.