Chevrolet 24288531 Battery Assembly, High Vltg

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Some systems on the vehicle require battery power to be available at all times, either to maintain continuous operation such as the alarm system, power door locks, etc., or to maintain control unit memory like radio station presets, Powertrain Control Module and other control units. When the battery is disconnected, the power that maintains these systems is cut. Therefore, before you disconnect the battery, it's important to remove the key from the ignition and to keep it with you, especially on a vehicle with power door locks, to prevent it from getting locked inside if the power door locks should engage accidentally when the battery is reconnected. Devices known as memory-savers can be used to avoid some of these problems. The typical memory saver is plugged into the cigarette lighter and is connected to a spare battery, allowing the vehicle battery to be disconnected from the electrical system. The memory saver will provide sufficient current to maintain audio unit security codes, PCM memory, etc. and will provide power to always hot circuits such as the clock and radio memory circuits. To disconnect the battery for service procedures requiring power to be cut from the vehicle, open the battery box cover and remove the nut attaching the negative battery cable terminal to the battery. Isolate the cable end to prevent it from coming into accidental contact with the battery terminal. When reconnecting the battery, always connect the positive cable first and the negative cable last.

Detach the Powertrain Control Module (PCM) bracket from the battery tray. Remove the fasteners securing the battery tray. Detach the harness from the battery tray and remove the tray.