For 1990-2009 cars

Caution: Batteries produce explosive gases. Batteries contain corrosive acid. Batteries supply levels of electrical current high enough to cause burns. Therefore, in order to reduce the risk of personal injury while working near a battery, observe the following guidelines:

• | Always shield your eyes.

• | Avoid leaning over the battery whenever possible.

• | Do not expose the battery to open flames or sparks.

• | Do not allow battery acid to contact the eyes or the skin.

- | Flush any contacted areas with water immediately and thoroughly.

- | Get medical help.

Important: Because of the materials used in the manufacture of automotive lead-acid batteries, dealers and service shops that handle them are subject to regulations issued by various state or local agencies. Other regulations may also apply in other locations. Always know and follow these regulations when handling batteries.

Batteries that are no longer wanted must be disposed of by an approved battery recycler and must never be thrown in the rubbish or sent to a land-fill. Batteries that are not part of the vehicle itself, not the battery under the hood, must only be transported on public streets for business purposes via approved hazardous material transportation procedures. Battery storage, charging and testing facilities in repair shops must meet various requirements for ventilation, safety equipment, material segregation, etc.

The maintenance-free battery has no vent plugs in the cover. The battery is completely sealed except for 2 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 3 functions as a major source of energy:

• | Engine cranking

• | Voltage stabilizer

• | Alternate source of energy with alternator overload

The battery specification label, example below, contains information about the following:

• | The test ratings

• | The original equipment catalogue number

• | The recommended replacement model number

### Battery Ratings

A battery may have 3 ratings:

• | Amp Hour (AH)

• | Reserve Capacity (RC)

• | Cold Cranking Amperage (CCA)

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

### Amp Hour (AH)

The amp hour rating of a battery is the amount of time it takes a fully charged battery, being discharged at a constant rate of 1 amperes and a constant temperature of 27°C (80°F), to reach a terminal voltage of 10.5 volts. Refer to Battery Usage for the amp hour rating of the original equipment battery.

### Reserve Capacity (RC)

Reserve capacity is the amount of time in minutes it takes 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. Refer to Battery Usage for the reserve capacity rating of the original equipment battery.

### Cold Cranking Amperage (CCA)

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

### Police Package Special Equipment Battery Options

Important: GM cannot be held responsible for any changes made to the vehicle. All electrical and body modifications must be preformed by experience and qualified technicians.

• | Be sure that any modified or added wiring will not impact the function of the vehicles factory wiring system.

• | See that all wiring is correctly protected by fuses, and not causing a overload to connectors and components.

• | Do not route wiring in areas of the vehicle where temperatures can be high or where wiring may be cut, pinched or rubbed.

• | See that all wiring is of the same or smaller gauge to that of the wire it is being attached to for correct fuse protection.

• | Be sure that all holes drilled in the body are correctly sealed and corrosion protected. See that the vehicles wiring harnesses, piping, and other components have not been displaced or damaged during customer installation of equipment and wiring.

• | See that the vehicles wiring harnesses, piping, and other components have not been displaced or damaged during customer installation of equipment and wiring.

#### Electrical Connections

Overloading the vehicles electrical system may damage the vehicles accessories. Do not overload the vehicles system by having unnecessary accessories at the same time.

#### Auxiliary Battery

The auxiliary battery is located in the rear compartment in the right hand side quarter panel cavity. The auxiliary battery has a secondary fuse box attached to the right hand side of the battery tray. The function of the auxiliary battery is to supply power to all of the after market components fitted to the vehicle:

• | Sirens.

• | Flashing lights (Front, rear and roof).

• | Two way radio.

• | Speed detector.

#### Battery Isolator

The electrical system has a battery isolator located in the rear compartment mounted on the left hand side quarter panel, the isolator should be mounted as close as possible to the Start Battery with the coil terminal facing up or horizontal. The battery isolator is designed to protect the Start Battery from excessive discharge whist allowing the auxiliary battery to supply non-essential loads. The battery isolator detects the Start Battery voltage when it drops below 12.7 Volts on a 12V system (25.4 volts on a 24V system) the solenoid will open, separating the Start Battery from the auxiliary battery. Once the engine has been started the battery isolator monitors the Start Battery and the charging system. When the charging system reaches 13.6V (27.2 Volts on a 24V system) indicating a fully charge Start Battery, the battery isolator will close the solenoid connecting the auxiliary battery to the Start Battery and the charging system.