Charging Procedure

TOOLS REQUIRED
GM P/N 12303040 Battery Terminal Adapters

CAUTION: Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

1. When charging a battery in the vehicle, proceed to step 2. If you are charging side terminal batteries out of the vehicle, install an adapter kit GM P/N 12303040. The adapters should be tight against the lead terminals of the battery to keep resistance between the adapter and the battery terminals to a minimum.
2. Make sure all the charger connections are clean and tight.
3. Charge the battery using the charger setting for 12 V batteries that gives the highest charge rate to the battery until the green dot appears. (Do not use the charger settings for jump-starting vehicles to charge the battery. Refer to the charger manufacturer's instructions.) The battery should be checked periodically while charging. Tap the hydrometer lightly on the top to dislodge any air bubbles that may prevent a correct indication.
4. If the battery feels hot, temperature above 53°C (125°F), or if violent gassing or spewing of electrolyte through the vent holes occurs, discontinue charging or reduce the charging rate.
5. After charging, the battery should be tested. Refer to Battery Load Test Testing and Inspection