GM Service Manual Online
For 1990-2009 cars only

Object Number: 190959  Size: SF

The maintenance free battery is standard on all vehicles. The battery has a small acid overflow tank attached at the top near the positive terminal. This tank should not be removed. If the battery is being replaced, install a new tank on the new battery and leave the old tank on the battery being scrapped. The battery is completely sealed except for two small vent holes in the sides. The vent holes allows the small amount of gas 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 equipment catalog number
    • The recommended replacement model number

Object Number: 531145  Size: SH

Battery Ratings

A battery has two ratings:

    • Reserve capacity
    • Cold cranking amperage

When a battery is replaced use a battery with similar ratings. Refer to the battery specification label on the original battery or refer to Battery Usage .

Reserve Capacity

Reserve capacity is the time (in minutes) necessary to discharge a completely charged battery to a terminal voltage of 10.5 volts under the following conditions:

    • A constant rate of 25 amperes.
    • A constant temperature of 27° C (80° F).

Refer to Battery Usage for the reserve capacity rating of the original equipment battery.

Cold Cranking Amperage

The cold cranking amperage is an indication of the ability of the battery to crank the engine at cold temperatures. The cold cranking amperage is the minimum amperage necessary to maintain 7.2 volts for 30 seconds at -18° C (0° F). Refer to Battery Usage for the cold cranking amperage rating for this vehicle.