GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 890171  Size: SH
  1. Unclip the heater wire harness from the headlamp tab (1).
  2. Unclip the heater wire harness below the on the outside of the battery (2).

  3. Object Number: 890190  Size: SH
  4. Unclip the heater wire harness from the main wire harness (1).

  5. Object Number: 890228  Size: SH
  6. Unclip the heater cartridge from the engine block.

Installation Procedure


    Object Number: 890228  Size: SH
  1. Fully seat the heater cartridge against the engine block and ensure the retaining clip snaps in place. The final orientation of the wire harness should be in the 3 o'clock position. Turn the retaining clip 90 degrees from the wire harness to the 12 o'clock position.
  2. Ensure the wire harness cartridge plug is fully seated onto the cartridge.
  3. Ensure the main wire harness clip (1) is fully seated.

  4. Object Number: 890190  Size: SH
  5. Route the heater wire harness as shown.

  6. Object Number: 890171  Size: SH
  7. Tuck the heater wire harness below the junction box on the outside of the battery.
  8. Tuck the 110V heater plug in the space in between the battery and headlamp assembly (1).
  9. Clip the heater wire harness on the outside of the battery (2).
  10. Ensure that the 110V plug tie-strap securely holds the wire bundle and the protector cap is fully seated on the plug.