Buick 2007 LaCrosse Owner's Manual page 390

Notice: If the jumper cables are connected
or removed in the wrong order, electrical
shorting may occur and damage the vehicle.
The repairs would not be covered by your
warranty. Always connect and remove
the jumper cables in the correct order,
making sure that the cables do not touch
each other or other metal.
390
Jumper Cable Removal
A. Heavy, Unpainted Metal Engine Part or
Remote Negative ( ) Terminal
B. Good Battery or Remote Positive (+) and
Remote Negative ( ) Terminals
C. Dead Battery or Remote Positive (+) Terminal