Hummer 2003 H2 Owner's Manual page 310

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.
5-8
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