GM Service Manual Online
For 1990-2009 cars only

Caution: Batteries generate hydrogen gas, which is extremely flammable and may explode violently if ignited by a spark or a flame. Battery acid is extremely corrosive and causes severe personal injury if the acid comes into contact with the skin, and blindness if the acid comes into contact with the eyes. In order to avoid severe personal injury, use extreme caution when servicing the battery or battery-related components.


Object Number: 1058  Size: SH

The maintenance free battery is standard. There are no vent plugs in the cover. The battery is completely sealed except for two small vent holes in the side. These vent holes allow the small amount of gas that is produced in the battery to escape.

The battery has three functions as a major source of energy:

    • Engine cranking
    • Voltage stabilizer
    • Alternate source of energy with generator overload

The battery specification label contains information about the following:

    • The test ratings
    • The original model number
    • The recommended replacement model number
    • The cold cranking amps (CCA)