GM Service Manual Online
For 1990-2009 cars only

Radio Speaker Amplifier Replacement U57

Removal Procedure

  1. Remove the rear seat back. Refer to Rear Seat Back Replacement in Seats.
  2. Remove the fasteners retaining the audio amplifier (1).

  3. Object Number: 584777  Size: SH
  4. Disconnect the audio amplifier electrical connectors (2) from the audio amplifier (1).
  5. Remove the audio amplifier (1) from the vehicle.

Installation Procedure


    Object Number: 584777  Size: SH
  1. Install the audio amplifier (1) in the vehicle.
  2. Connect the audio amplifier electrical connectors (2) to the audio amplifier (1).
  3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the audio amplifier fasteners.
  5. Tighten
    Tighten the fasteners to 9 N·m (80 lb in).

  6. Install the rear seat back. Refer to Rear Seat Back Replacement in Seats.

Radio Speaker Amplifier Replacement w/o U57

Removal Procedure


    Object Number: 584777  Size: SH
  1. Remove the rear seat back. Refer to Rear Seat Back Replacement in Seats.
  2. Remove the fasteners retaining the radio amplifier (1).
  3. Disconnect the radio amplifier electrical connectors (2) from the radio amplifier (1).

  4. Object Number: 625727  Size: SH
  5. Remove the rear compartment trim. Refer to Rear Compartment Trim Panel Replacement in Body Rear End.
  6. Remove the mounting bracket fasteners (2).
  7. Remove the mounting bracket (1) in order to allow the necessary clearance to remove the radio amplifier.
  8. Remove the radio amplifier (1) from the vehicle.

Installation Procedure


    Object Number: 584777  Size: SH
  1. Install the radio amplifier (1) to the vehicle.
  2. Connect the radio amplifier electrical connectors (2) to the radio amplifier (1).
  3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the radio amplifier fasteners.
  5. Tighten
    Tighten the fasteners to 9 N·m (80 lb in).


    Object Number: 625727  Size: SH
  6. Install the mounting bracket (1).
  7. Install the mounting bracket fasteners (2).
  8. Tighten
    Tighten the mounting bracket fasteners (2) to 9 N·m (80 lb in).

  9. Install the rear compartment trim. Refer to Rear Compartment Trim Panel Replacement in Body Rear End.
  10. Install the rear seat back. Refer to Rear Seat Back Replacement in Seats.