Battery Replacement. Chevrolet Export Express 1998

For 1990-2009 cars

The maitenence-free battery is standard in all applications. There is one or two batteries equipped on these vehicles depending on the optional equipment used. The battery is completely sealed except for two small vent holes mounted on the top of the battery. The vent holes are used to vent small amounts of gas to escape from the battery. The battery has three functions in the electrical system.

• | Provides a source of energy for cranking the engine.

• | Acts as a voltage stabilizer for electrical system.

• | Provides energy when the electrical load exceeds the output of the generator (for a limited time).

This battery is made up of components that could be hazardous to the environment. dispose of the battery as required by regulations.

The battery specification label contains information in the servicing of the battery. This information includes test ratings and the recommended replacement parts.

#### Reserve Capacity

The reserve capacity is an estimate of how long the vehicle can be driven with no generator output, the headlamps turned on and a minimum electrical load (most of the accessories turned off). It is the maximum amount of time (in minutes) it will take for a fully charged battery, being discharged at a constant rate of 25 amperes and a constant temperature of 27°C (80°F), to reach a terminal voltage of 10.5 volts. Other temperature or current draws, the state of charge, the condition of the battery, etc., will affect how long the battery will actually last when the vehicle is being driven without generator output. A battery has two ratings:

• | The reserve capacity

• | The cold cranking amperage. Refer to Battery Usage (Ambulance Package) or Battery Usage (Passenger/Cargo/Cutaway) in Engine Electrical.

#### Cold Cranking Amperage

Cold cranking amperage is an indication of the ability of the battery to crank the engine at cold temperatures. This rating is the minimum amperage the battery must maintain for 30 seconds at -18°C (0°F), while maintaining at least 7.2 volts. The actual performance of a battery will vary with actual temperature.