GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1997 🢒 Catera 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Control Assembly Replacement

Removal Procedure

Caution: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions:

   • Air bag deployment
   • Personal injury
   • Unnecessary SIR system repairs
In order to avoid the above conditions, observe the following guidelines:
   • Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring.
   • If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to Disabling the SIR System.

  1. Remove the radio/tape player. Refer to Radio Replacement in Entertainment.

    2. Object Number: 156085 Size: SH
  2. Remove the Heating and A/C control (H-A/C) screws.
  3. Disconnect the H-A/C control electrical connections.

    4. Object Number: 156086 Size: SH
  4. Remove the H-A/C control.

    5. Continue with disassembly:

    • If servicing the H-A/C control indicator bulbs.
    • If servicing the H-A/C control bracket.
    • If servicing the Printed Circuit Board (PCB).

    Object Number: 156087 Size: SH
  5. Perform the following steps to remove the H-A/C control from the bracket:
    6. 5.1. Depress the tabs (1) on the side of the control face to release the H-A/C from the bracket.
    5.2. Slide the H-A/C out of the bracket.

    Object Number: 156089 Size: SH
  6. Use a flat-bladed tool to turn the H-A/C control indicator bulbs counterclockwise to remove the H-A/C control indicator bulbs from the H-A/C control.
  7. Remove the PCB from the H-A/C control.
  8. Remove the ribbon from the H-A/C control.

Installation Procedure
  1. If applicable, install the PCB to the H-A/C control.
  2. Install the ribbon to the H-A/C control.

    3. Object Number: 156089 Size: SH
  3. Use a flat-bladed tool to turn the H-A/C control indicator bulbs clockwise to install the H-A/C control indicator bulbs to the H-A/C control.

    4. Object Number: 156088 Size: SH
  4. Perform the following steps to install the H-A/C control to the bracket:
    5. 4.1. Slide the PCB into the slot.
    4.2. Snap the H-A/C control face into the bracket.

    Object Number: 156086 Size: SH
  5. Install the H-A/C control.
  6. Connect the H-A/C control electrical connectors.

    7. Object Number: 156085 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.

  7. Install the H-A/C control screws.

    8. Tighten
    Tighten the H-A/C control screws until fully seated and not stripped the H-A/C control screws.

  8. Install the radio/tape player. Refer to Radio Replacement in Entertainment.
  9. Program the H-A/C control with a scan tool by selecting the programming procedure from the Air Conditioning Special Functions menu and follow the instructions on the screen.