GM Service Manual Online
For 1990-2009 cars only

Control Assembly Replacement LHD HVAC Controller

Removal Procedure


    Object Number: 881349  Size: SH
  1. Depress the center pins inward to release radio/HVAC controller cover push pin fasteners.
  2. Important: Do not push center pins through fasteners.

  3. Remove the fasteners and pull radio/HVAC controller cover rearward.
  4. Disconnect the traction control/fog lamps/rear defog electrical connector if equipped.

  5. Object Number: 877964  Size: SH
  6. Remove the radio screws.
  7. Push the spring clips in through D-holes on both sides of the radio brace.
  8. Pull the radio out slightly to access the rear of the radio

  9. Object Number: 877967  Size: SH
  10. Disconnect the electrical connector and antenna.
  11. Remove the radio.

  12. Object Number: 1200114  Size: SH
  13. Disconnect the blower switch, A/C-Recirc and lighting and electrical connectors. Remove electrical harness clip from module boss.

  14. Object Number: 903907  Size: SH
  15. Remove the temperature and mode cables from HVAC controller by squeezing lock tabs together while pulling cable housing straight up.
  16. Remove the cables from pins by pulling straight up.
  17. (Service cables shown in illustration.


    Object Number: 903908  Size: SH
  18. Remove the screws and HVAC controller.

Installation Procedure


    Object Number: 903908  Size: SH
  1. Install the HVAC controller.
  2. Install and tighten the screws.
  3. Tighten
    Tighten to 2.5 N·m (22 lbs in)


    Object Number: 903907  Size: SH
  4. Install the temperature and mode cables over the pins.
  5. Cable Identification:

    • Temperature cable -- white
    • Mode cable -- black
  6. Install the cable housings into the channel and push down to lock.

  7. Object Number: 1200114  Size: SH
  8. Connect the blower switch, A/C-Recirc and lighting electrical connectors.
  9. Important: Make sure wiring harnesses do not interfere with control lever movement.

  10. Install the electrical harness clip to module boss.

  11. Object Number: 877967  Size: SH
  12. Connect the electrical connector and antenna to the radio.

  13. Object Number: 877964  Size: SH
  14. Install the radio.
  15. Important: Make sure the spring clips are seated in D-holes on both sides.

  16. Install and tighten the screws.
  17. Tighten
    Tighten to 2.5 N·m (22 lbs in)


    Object Number: 881349  Size: SH
  18. Connect the traction control/fog lamp/rear defog electrical connector, if equipped.
  19. Install the radio/HVAC controller cover. Push in at clip locations.
  20. Install the push pins and lock.

Control Assembly Replacement Bulbs

Removal Procedure


    Object Number: 903908  Size: SH
  1. Remove the HVAC controller. (Refer to "HVAC Controller" in this service manual.)

  2. Object Number: 903914  Size: SH
  3. Turn the bulb socket counterclockwise to remove from control.
  4. Wrap a small piece of scotch tape around bulb and pull out of socket.

Installation Procedure


    Object Number: 903914  Size: SH
  1. Push the bulb straight into the socket.
  2. Align the tabs on the socket with the control and insert the socket into the control.
  3. Turn clockwise to lock.
  4. Install the HVAC controller. (Refer to "HVAC Controller" in this service manual.)

Control Assembly Replacement Wiring Harness

Removal Installation


    Object Number: 903913  Size: SH
  1. Remove the HVAC controller. (Refer to "HVAC Controller" in this manual.)
  2. Remove the bulb sockets, electrical connector and wiring harness from HVAC control.

Installation Procedure


    Object Number: 903913  Size: SH
  1. Install the wiring harness, electrical connector and the bulb sockets to control.
  2. Install the HVAC controller. (Refer to "HVAC Controller" in this service manual.)

Control Assembly Replacement RHDD HVAC Controller

Removal Procedure


    Object Number: 881349  Size: SH
  1. Depress the center pins inward to release radio/HVAC controller cover push pin fasteners.
  2. Important: Do not push center pins through fasteners.

  3. Remove the fasteners and pull radio/HVAC controller cover rearward.
  4. Disconnect the traction control/fog lamps/rear defog electrical connector if equipped.

  5. Object Number: 903396  Size: SH
  6. Remove the radio screws.
  7. Push the spring clips in through D-holes on both sides of the radio brace.
  8. Pull the radio out slightly to access the rear of the radio

  9. Object Number: 903535  Size: SH
  10. Disconnect the electrical connector and antenna.
  11. Remove the radio.

  12. Object Number: 1200114  Size: SH
  13. Disconnect the blower switch, A/C-Recirc and lighting and electrical connectors. Remove electrical harness clip from module boss.

  14. Object Number: 903907  Size: SH
  15. Remove the temperature and mode cables from HVAC controller by squeezing lock tabs together while pulling cable housing straight up.
  16. Remove the cables from pins by pulling straight up.

  17. Object Number: 903908  Size: SH
  18. Remove the screws and HVAC controller.

Installation Procedure


    Object Number: 903908  Size: SH
  1. Install the HVAC controller.
  2. Install and tighten the screws.
  3. Tighten
    Tighten to 2.5 N·m (22 lbs in)


    Object Number: 903907  Size: SH
  4. Install the temperature and mode cables over the pins.
  5. Cable Identification:

    • Temperature cable -- white
    • Mode cable -- black
  6. Install the cable housings into the channel and push down to lock.

  7. Object Number: 1200114  Size: SH
  8. Connect the blower switch, A/C-Recirc and lighting electrical connectors.
  9. Important: Make sure wiring harnesses do not interfere with control lever movement.

  10. Install the electrical harness clip to module boss.

  11. Object Number: 903535  Size: SH
  12. Connect the electrical connector and antenna to the radio.

  13. Object Number: 903396  Size: SH
  14. Install the radio.
  15. Important: Make sure the spring clips are seated in D-holes on both sides.

  16. Install and tighten the screws.
  17. Tighten
    Tighten to 2.5 N·m (22 lbs in)


    Object Number: 881349  Size: SH
  18. Connect the traction control/fog lamp/rear defog electrical connector, if equipped.
  19. Install the radio/HVAC controller cover. Push in at clip locations.
  20. Install the push pins and lock.