Cutlass L4-138 2.3L VIN A FI HP (1990)
Heater Core: Service and Repair
Removal
REMOVE OR DISCONNECT
1. Negative battery cable.
2. Drain coolant system.
3. Heater hoses from core.
4. Blow out residual coolant from core using shop air. This will prevent coolant leakage into the passenger compartment.
5. Heater core cover. Refer to Heater Core Case.
6. Core.