GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Heater Core Replacement

Removal Procedure

    Object Number: 292121 Size: SH
  1. Disconnect the heater hoses from the heater core. Refer to Heater Hoses Replacement .
  2. Remove the instrument panel assembly. Refer to Instrument Panel Carrier Replacement in instrument Panel, Gauges and Console.
  3. Remove the heater core cover screws (1).

    4. Object Number: 292125 Size: SH
  4. Remove the heater core retaining screws (1).

    5. Object Number: 292087 Size: SH
  5. Remove the heater core retaining straps.
  6. Remove the heater core.
  7. Remove the heater core case seals.

Installation Procedure

    Object Number: 292087 Size: SH
  1. Install the heater core.
  2. Install the heater core retaining straps.
  3. Install new heater core case seals.

    4. Object Number: 292125 Size: SH
  4. Install the heater core retaining screws (1).

    5. Object Number: 292121 Size: SH
  5. Install the heater core cover screws (1).
  6. Install the instrument panel assembly. Refer to Instrument Panel Carrier Replacement in instrument Panel, Gauges and Console.
  7. Connect the heater hoses to the heater core. Refer to Heater Hoses Replacement .