GMC 2003 C4C042 Owner's Manual page 234

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
To disconnect the jumper cables from both vehicles, do
the following:
1. Disconnect the black negative (
vehicle that had the dead battery.
2. Disconnect the black negative (
vehicle with the good battery.
3. Disconnect the red positive (+) cable from the
vehicle with the good battery.
4. Disconnect the red positive (+) cable from the
other vehicle.
5. Return the positive (+) remote terminal cover to its
original position.
-
) cable from the
-
) cable from the
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