GM Service Manual Online
For 1990-2009 cars only

    Object Number: 354227  Size: SH
  1. Disconnect the temperature control cable from the clip and the door at the heater case.
  2. Set the temperature lever to full COLD.
  3. At the heater case, push the door lever fully forward (counterclockwise) and affix the cable into position.
  4. Test the temperature lever for smooth operation. Ensure that the temperature lever stops at the proper positions.