GM Service Manual Online
For 1990-2009 cars only

Radio Replacement UY4

Removal Procedure

  1. Remove the rear shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement in Interior Trim.
  2. Remove the rear shelf carrier panel. Refer to Rear Shelf Carrier Replacement in Interior Trim.

  3. Object Number: 474819  Size: SH
  4. Remove the fasteners (4) retaining the radio (5) to the radio / navigation processor bracket.
  5. Disconnect the electrical connectors (1, 3) and the antenna (2) from the radio (5).
  6. Remove the radio (5) from the radio / navigation processor bracket.

Installation Procedure


    Object Number: 474819  Size: SH
  1. Install the radio (5) to the radio / navigation processor bracket.
  2. Reconnect the antenna (2) and the electrical connectors (1, 3) to the radio (5).
  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 fasteners (4) that retain the radio (5) to the radio / navigation processor bracket.
  5. Tighten
    Tighten the radio fasteners to 5 N·m (44 lb in).

  6. Install the rear shelf carrier panel. Refer to Rear Shelf Carrier Replacement in Interior Trim.
  7. Install the rear shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement in Interior Trim.

Radio Replacement w/o UY4, U45

Removal Procedure

  1. Remove the instrument panel center trim plate. Refer to Instrument Panel Center Trim Panel Replacement in Instrument Panel, Gauges, and Console.
  2. Remove the heater and A/C  (HVAC) control. Refer to HVAC Control Module Replacement in Heating, Ventilation and Air Conditioning.

  3. Object Number: 474815  Size: SH
  4. Push and hold the release tabs on the left and right sides of the radio in order to release the radio from the IP.

  5. Object Number: 474818  Size: SH
  6. Partially remove the radio from the IP in order to disconnect the antenna (2) and the electrical connector (1) from the radio.
  7. Remove the radio from the IP.
  8. Important: New and remanufactured radios do not come with mounting brackets, studs or nuts. The hardware will need to be transferred to the new or remanufactured radio.

  9. If the radio is to be replaced, remove the mounting brackets and studs from the radio.

Installation Procedure

  1. Install the mounting brackets and studs to the radio.

  2. Object Number: 474818  Size: SH
  3. Partially install the radio in order to connect antenna (2) and electrical connector (1).

  4. Object Number: 474815  Size: SH
  5. Align the radio alignment pins to the IP opening and push the radio towards the front of the vehicle until an audible click is heard.
  6. Tug on the radio in order to verify the radio is secure.
  7. Install the HVAC control. Refer to HVAC Control Module Replacement in Heating, Ventilation and Air Conditioning.
  8. Install the IP center trim plate. Refer to Instrument Panel Center Trim Panel Replacement in Instrument Panel, Gauges, and Console.