GMC 2006 Sierra - Manual (Page 469)

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 (
−
) cable from the
vehicle that had the bad battery.
2. Disconnect the black negative (
−
) cable from 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.
5. Return the remote positive (+) terminal cover,
if equipped, to its original position.
Jumper Cable Removal
5-57