GM Service Manual Online
For 1990-2009 cars only

Radio Speaker Amplifier Replacement Base

Removal Procedure


    Object Number: 521803  Size: SH
  1. Lower the glove box.
  2. Disconnect the electrical connectors.
  3. Use the following steps in order to remove the amplifier from the bracket:
  4. 3.1. Push the retention clip upward and in.
    3.2. Rotate the amplifier.
    3.3. Push the amplifier up in order to clear the amplifier mounting bracket and the HVAC module.
    3.4. Remove the amplifier.

Installation Procedure


    Object Number: 521803  Size: SH
  1. Connect the amplifier to the bracket by clipping the amplifier into place.
  2. Connect the electrical connectors.
  3. Inspect the system operation.

Radio Speaker Amplifier Replacement Denali Yukon

Removal Procedure

  1. Remove the rear quarter panel. Refer to Rear Quarter Trim Panel Replacement in Interior Trim.

  2. Object Number: 756158  Size: SH
  3. Remove the four amplifier retaining bolts (1).
  4. Disconnect the electrical connector.
  5. Remove the amplifier from the vehicle.

Installation Procedure


    Object Number: 756158  Size: SH
  1. Install the amplifier to the subwoofer.
  2. 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.

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

  5. Connect the electrical connector.
  6. Install the rear quarter panel. Refer to Rear Quarter Trim Panel Replacement in Interior Trim.

Radio Speaker Amplifier Replacement Denali Suburban

Removal Procedure

  1. Remove the rear quarter panel. Refer to Rear Quarter Trim Panel Replacement in Interior Trim.

  2. Object Number: 758478  Size: SH
  3. Remove the amplifier retaining bolts (2).
  4. Disconnect the electrical connector (1).
  5. Remove the amplifier from the vehicle.

Installation Procedure


    Object Number: 758478  Size: SH
  1. Install the amplifier to the vehicle.
  2. 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.

  3. Install the amplifier retaining bolts (2).
  4. Tighten
    Tighten the screws to 9.0 N·m (80 lb in)

  5. Connect the electrical connector (1).
  6. Install the rear quarter panel. Refer to Rear Quarter Trim Panel Replacement in Interior Trim.