GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Drain the cooling system. Refer to Cooling System Draining and Filling.
  2. Remove Instrument panel lower trim panel - left side. Refer to Instrument Panel Lower Trim Panel Replacement - Left Side.
  3. Remove instrument outer trim cover - left side. Refer to Instrument Panel Outer Trim Cover Replacement - Left Side.
  4. Remove instrument panel lower trim pad cover. Refer to Instrument Panel Lower Trim Pad Cover Replacement.

  5. Object Number: 2027264  Size: SH
  6. Remove instrument panel bolt (1).

  7. Object Number: 2027271  Size: SH
  8. Remove heater core cover bolt (1) and heater core cover (2).

  9. Object Number: 2027273  Size: SH
  10. Remove the 2 heater core clamps (2) and remove heater core (1).

Installation Procedure


    Object Number: 2027273  Size: SH
  1. Install the heater core (1) and the 2 heater core clamps (2).

  2. Object Number: 2027271  Size: SH
  3. Install heater core cover bolt (1) and heater core cover (2).

  4. Object Number: 2027264  Size: SH
  5. Install instrument panel bolt (1).
  6. Install instrument panel lower trim pad cover - left side. Refer to Instrument Panel Lower Trim Pad Cover Replacement.
  7. Install instrument outer trim cover - left side. Refer to Instrument Panel Outer Trim Cover Replacement - Left Side.
  8. Install instrument panel lower inner panel Instrument Panel Lower Trim Panel Replacement - Left Side.
  9. Bleed the cooling system. Refer to Cooling System Draining and Filling.