GM Service Manual Online
For 1990-2009 cars only

Radio Speaker Amplifier Replacement LWB

Removal Procedure


    Object Number: 1957901  Size: SH
  1. Remove the left-hand side carpet trim. Refer to Rear Compartment Side Trim Panel Replacement.
  2. Remove the battery. Refer to Battery Replacement.
  3. Disengage the battery harness retainer (2) securing the harness to the amplifier mounting bracket (1).
  4. Remove the bolts (3) securing the amplifier mounting bracket to the vehicle.
  5. Disconnect the electrical connector from the amplifier.
  6. Remove the amplifier and bracket assembly.

  7. Object Number: 1957903  Size: SH
  8. Loosen the screws (1) holding the amplifier to the mounting bracket.
  9. Important: Slide the amplifier upward to release the screw heads from the slots in the mounting bracket.

  10. Remove the amplifier from the mounting bracket.

Installation Procedure


    Object Number: 1957903  Size: SH

    Important: Insert the amplifier screw heads (1) into the mounting bracket slots and slide the amplifier downward to secure the screw heads into the slots in the mounting bracket.

  1. Install the amplifier to the mounting bracket.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Tighten the amplifier to mounting bracket retaining screws (1).
  4. Tighten
    Tighten the screws to 2.5 N·m (22 lb in).


    Object Number: 1957901  Size: SH
  5. Install the amplifier and bracket assembly (1).
  6. Connect the electrical connector to the amplifier.
  7. Notice: Refer to Fastener Notice in the Preface section.

  8. Install the amplifier mounting bracket to vehicle retaining bolts (3).
  9. Tighten
    Tighten the bolts to 22 N·m (16 lb ft).

    Important: Ensure the retainer (2) securing the harness to the amplifier mounting bracket (1) engages correctly.

  10. Connect the battery harness to the amplifier bracket assembly.
  11. Install the battery. Refer to Battery Replacement.
  12. Install the left-hand side carpet trim. Refer to Rear Compartment Side Trim Panel Replacement.
  13. Refer to Control Module References.

Radio Speaker Amplifier Replacement SWB

Removal Procedure


    Object Number: 1957901  Size: SH
  1. Remove the left-hand side carpet trim. Refer to Rear Corner Trim Panel Carpet Replacement
  2. Remove the battery. Refer to Battery Replacement .
  3. Disengage the battery harness retainer (2) securing the harness to the amplifier mounting bracket (1).
  4. Remove the bolts (3) securing the amplifier mounting bracket to the vehicle.
  5. Disconnect the electrical connector from the amplifier.
  6. Remove the amplifier and bracket assembly.

  7. Object Number: 1957903  Size: SH
  8. Loosen the screws (1) holding the amplifier to the mounting bracket.
  9. Important: Slide the amplifier upward to release the screw heads from the slots in the mounting bracket.

  10. Remove the amplifier from the mounting bracket.

Installation Procedure


    Object Number: 1957903  Size: SH

    Important: Insert the amplifier screw heads (1) into the mounting bracket slots and slide the amplifier downward to secure the screw heads into the slots in the mounting bracket.

  1. Install the amplifier to the mounting bracket.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Tighten the amplifier to mounting bracket retaining screws (1).
  4. Tighten
    Tighten the screws to 2.5 N·m (22 lb in).


    Object Number: 1957901  Size: SH
  5. Install the amplifier and bracket assembly (1).
  6. Connect the electrical connector to the amplifier.
  7. Notice: Refer to Fastener Notice in the Preface section.

  8. Install the amplifier mounting bracket to vehicle retaining bolts (3).
  9. Tighten
    Tighten the bolts to 22 N·m (16 lb ft).

    Important: Make sure the retainer (2) securing the harness to the amplifier mounting bracket (1) engages correctly.

  10. Connect the battery harness to the amplifier bracket assembly.
  11. Install the battery. Refer to Battery Replacement .
  12. Install the left-hand side carpet trim. Refer to Rear Corner Trim Panel Carpet Replacement
  13. Refer to Control Module References .