GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1242224  Size: SH
  1. Remove the HVAC module. Refer to HVAC Module Assembly Replacement .
  2. Important: Rotate the diagnostic test mode (DTM) sensor counterclockwise to disengage the sensor from the lower duct.

  3. Disconnect the lower RH DTM sensor electrical connector.
  4. Remove the lower RH DTM sensor from the HVAC module.

Installation Procedure


    Object Number: 1242224  Size: SH

    Important: Rotate the DTM sensor clockwise to engage the sensor to the lower duct.

  1. Install the lower RH DTM sensor to the HVAC module.
  2. Connect the lower RH DTM sensor electrical connector.
  3. Install the HVAC module. Refer to HVAC Module Assembly Replacement .