GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Heater Core Replacement

Removal Procedure
  1. Remove the HVAC module from the vehicle. Refer to Heater/Vent Module Replacement .

    2. Object Number: 598883 Size: SH
  2. Remove the 7 screws (1) that hold the heater cover (5) to the heater case (2).
  3. Remove the heater cover (5).
  4. Remove the heater core (4) from the retainer.

Installation Procedure

    Object Number: 598883 Size: SH
  1. Install the heater core (4) into the retainer.
  2. Install the heater cover (5).
  3. Install the 7 screws (1) that hold the heater cover (5) to the heater case (2). Replace the seals.
  4. Install the HVAC module to the vehicle. Refer to Heater/Vent Module Replacement .