GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 603646  Size: SH
  1. Remove the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement .
  2. Remove the blower switch knob.
  3. Disconnect the blower switch electrical connector.

  4. Object Number: 603647  Size: SH
  5. Remove the blower switch from the lock tabs.
  6. Remove the blower switch from the HVAC control assembly.

Installation Procedure


    Object Number: 603647  Size: SH
  1. Install the blower switch to the HVAC control assembly.

  2. Object Number: 603646  Size: SH
  3. Install the blower switch knob.
  4. Connect the blower switch electrical connector.

  5. Install the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement .