GM Service Manual Online
For 1990-2009 cars only

Disconnect Procedure

Caution: Refer to Battery Disconnect Caution in the Preface section.

Important: Do NOT disconnect the negative battery cable from the battery until a period of at least 1 minute after performing the following: Turning the ignition to OFF, without pausing at ACCESSORY, and without applying the brake pedal. These steps are necessary to allow the brake system pressure relief procedure to occur. Failure to follow these steps may result in warning lamps and/or DTCs being set pertaining to interruption of the pressure relief procedure. Other vehicle systems may also be affected by not allowing a 1 minute duration for power-down.


    Object Number: 1968005  Size: SH
  1. Turn off all lamps and accessories.
  2. Turn the ignition OFF without pausing at ACCESSORY, and remove the ignition key.
  3. Wait for at least 1 minute before disconnecting the negative battery cable from the battery, to allow for proper power-down procedures of certain vehicle systems.
  4. Reposition the negative battery cable insulating cover (5) from the negative battery terminal.
  5. Rotate the lever lock (4) counterclockwise in order to disconnect the negative battery cable from the battery.

Connect Procedure

Important: Clean any existing corrosion from the battery terminal and the battery cable .


    Object Number: 1968005  Size: SH
  1. Install the negative battery cable (6) to the battery.
  2. Rotate the lever lock (4) clockwise until an audible click is heard in order to connect the negative battery cable to the battery.
  3. Position the negative battery cable insulating cover (5) over the negative terminal.