GMC C-Series 2001 Owner's Manual page 176

Jumper Cable Removal
A. Heavy, Unpainted Metal Engine Part
B. Good Battery
C. Dead Battery
To disconnect the jumper cables from both vehicles, do
the following:
1. Disconnect the black negative (
heavy, unpainted metal engine part on the vehicle
that had the dead battery.
2. Disconnect the black negative (
-
the negative ( ) terminal on the 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.
-
) cable from the
-
) cable from
5-9