Charging Procedure

TOOLS REQUIRED
GM P/N 12303040 Battery Terminal Adapters

NOTE: Turn OFF the ignition when connecting or disconnecting the battery cables, the battery charger or the jumper cables. Failure to do so may damage the PCM or other electronic components.

1. Do not charge a battery with a green hydrometer dot unless it has just been discharged, such as in cranking.
2. When charging side-terminal batteries while on-vehicle, use the following procedure:
2.1. Turn OFF the charger.
2.2. Connect the charger positive lead to the positive cable terminal located in the engine compartment on the right side.
2.3. Connect the negative charger lead to a solid engine ground, such as the generator mounting bracket.
3. When charging side-terminal batteries out of vehicle, install the GM P/N 12303040 battery terminal adapters.

Tighten
Tighten the battery side terminal adapters to 15 N.m (11 lb ft).

4. Make sure all battery terminals are clean and tight.
5. Best results occur when charging a battery that is at room temperature. A battery that is extremely cold may not accept current for several hours.
6. Charge the battery until the hydrometer has a green dot.
7. Inspect the battery every half hour after starting the battery charger.
8. Tap the hydrometer lightly to dislodge any air bubbles. The bubbles may cause a false indication.
9. After charging, test the battery. Refer to Battery Not Operating Properly.