Cadillac 2008 DTS Owner's Manual page 336

Notice: If you leave your radio or other accessories
on during the jump starting procedure, they could
be damaged. The repairs would not be covered
by your warranty. Always turn off your radio and
other accessories when jump starting your vehicle.
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 on the other
vehicle. Your vehicle has a remote positive (+)
jump starting terminal and a remote negative (−)
jump starting terminal.
4.6L LD8 Engine shown,
4.6L L37 Engine similar
The remote positive (+) terminal is located in the
engine compartment on the passenger's side of
the vehicle. Lift the red plastic cap to access
the terminal. See Engine Compartment Overview
on page 5-12 for more information on the location
of the remote positive (+) terminal.
A second remote positive (+) terminal is located on
the rear underseat fuse block.
The remote negative (−) terminal is located behind
the power steering pulley, near the engine cover.
It is marked GND (−).
5-41