C 2500 Suburban 2WD V8-454 7.4L VIN J SFI (1998)
Heater Core: Service and Repair
Auxiliary System
HEATER CORE REPLACEMENT - AUXILIARY
Auxiliary Heater Case
NOTE: This procedure is for vehicles without rear A/C. OE did not provide a procedure for vehicles With Rear A/C; however, OE did provide a
procedure for removing the auxiliary evaporator core which may assist in the removal of the auxiliary heater core. Refer to Evaporator Core.
Remove or Disconnect
1. Drain the engine coolant.
2. Remove the right rear quarter interior trim, as necessary.
3. Remove the right rear wheelhouse panel.
4. Disconnect the auxiliary heater hoses from heater core.
5. Disconnect the electrical connectors, as necessary.
6. Remove the drain valve.
7. Remove the bolts.
8. Remove the nuts.
9. Remove the heater module.
10. Remove the blower motor, if necessary.
11. Remove the heater case cover.
12. Remove the heater core.