GM Service Manual Online
For 1990-2009 cars only

Radio Replacement U1R, UM5, UM9

Removal Procedure


    Object Number: 474815  Size: SH
  1. Remove the instrument panel center trim plate. Refer to Instrument Panel Center Trim Panel Replacement.
  2. Remove the heating ventilation and air conditioning (HVAC) control. Refer to HVAC Control Module Replacement.
  3. Push and hold the release tabs on the left and right sides of the radio in order to release the radio from the I/P.

  4. Object Number: 474818  Size: SH
  5. Partially remove the radio from the I/P in order to disconnect the antenna (2) and the electrical connector (1) from the radio.
  6. Remove the radio from the I/P.

  7. Object Number: 787311  Size: SH

    Important: New and remanufactured radio (3) do not include the mounting brackets (2), studs (4) or nuts (1). The hardware will need to be transferred to the replacement radio.

  8. If the radio is to be replaced, remove the hardware (1, 2, 4) from the original radio/navigation data processor (3).

Installation Procedure


    Object Number: 787311  Size: SH

    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.

  1. Install the mounting hardware (1, 2, 4) to the radio (3).
  2. Tighten
    Tighten the radio nuts (1) to 5 N·m (44 lb in).


    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 I/P 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.
  8. Install the I/P center trim plate. Refer to Instrument Panel Center Trim Panel Replacement.
  9. Refer to Control Module References for programming and setup information.

Radio Replacement U3Q, U3R, U3S

Removal Procedure


    Object Number: 787313  Size: SH
  1. Remove the instrument panel (I/P) center trim plate. Refer to Instrument Panel Center Trim Panel Replacement.
  2. Remove the heating ventilation and air conditioning (HVAC) control. Refer to HVAC Control Module Replacement.
  3. Push and hold the release tabs on the left and right sides of the navigation radio in order to release the navigation radio from the IP.

  4. Object Number: 787315  Size: SH
  5. Partially remove the navigation radio from the I/P in order to disconnect the antennas and the electrical connections.
  6. Remove the navigation radio from the I/P.

  7. Object Number: 787312  Size: SH

    Important: New and remanufactured navigation radio (3) do not include the mounting brackets (2), studs (4) or nuts (1). The hardware will need to be transferred to the replacement navigation radio (3).

  8. If the navigation radio is to be replaced, remove the hardware (1, 2, 4) from the original navigation radio (3).

Installation Procedure


    Object Number: 787312  Size: SH
  1. Install the mounting hardware (1, 2, 4) to the navigation radio (3).

  2. Object Number: 787315  Size: SH
  3. Partially install the navigation radio in order to connect antennas and electrical connector.

  4. Object Number: 787313  Size: SH
  5. Align the navigation radio alignment pins to the I/P opening and push the navigation radio towards the front of the vehicle until an audible click is heard.
  6. Tug on the navigation radio in order to verify the navigation radio is secure.
  7. Install the HVAC control. Refer to HVAC Control Module Replacement .
  8. Install the I/P center trim plate. Refer to Instrument Panel Center Trim Panel Replacement.
  9. Refer to Control Module References for programming and setup information.