GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2008 🢒 G8 🢒 Preface 🢒 Cautions and Notices 🢒 Battery Replacement

Removal Procedure
  1. Remove the cargo area centre carpet. Refer to Rear Compartment Floor Panel Carpet Replacement
  2. Remove the left-hand side cargo area trim. Refer to Rear Compartment Side Trim Panel Replacement

    3. Object Number: 1949822 Size: SH
  3. Disconnect the battery negative cable (1) from the battery. Refer to Battery Negative Cable Disconnection and Connection.
  4. Disconnect the battery positive cable (2) from the battery.

    5. Object Number: 1949837 Size: SH
  5. Remove the battery retainer strap nut (1) from the battery retainer.
  6. Remove the battery retainer plate (2) from the vehicle.

    7. Object Number: 1949878 Size: SH
  7. Detach the battery vent hose (1) from the battery (2).
  8. Remove the battery (2) from the vehicle.

Installation Procedure

    Object Number: 1949878 Size: SH
  1. Install the battery (2) to the vehicle.

    2. Important: Replacement batteries may require the vent plug to be removed.

    Important: Make sure that the vent hole that is not used is sealed with a vent plug.

  2. Attach the battery vent hose (1) to the battery (2).

    3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1949837 Size: SH
  3. Install the battery retainer plate (2), locate the retainer strap to the retainer plate and install the battery retainer strap nut (1).

    4. Tighten
    Tighten the nut to 18 N·m (13 lb ft).


    Object Number: 1949822 Size: SH
  4. Connect the battery positive cable (2) to the battery.

    5. Tighten
    Tighten the nut to 17 N·m (13 lb ft).

  5. Connect the battery negative cable (1). Refer to Battery Negative Cable Disconnection and Connection.

    6. Tighten
    Tighten the nut to 17 N·m (13 lb ft).

  6. Install the cargo area centre carpet. Refer to Rear Compartment Side Trim Panel Replacement
  7. Instal the left-hand side cargo area trim. Refer to Rear Compartment Floor Panel Carpet Replacement
  8. Close rear compartment lid.