1. Park the vehicle in a safe location and turn off the engine. Allow the engine to cool down completely.
2. Disconnect the negative battery cable to prevent accidental electrical shock.
3. Locate the heater core in the engine compartment. It is usually located under the dashboard, behind the center console.
4. Remove the heater hoses from the heater core. Use a wrench to loosen the hose clamps and pull the hoses off of the heater core nipples.
5. Remove the mounting bolts that hold the heater core in place. There are usually two or three bolts on each side of the heater core.
6. Carefully remove the heater core from the vehicle. Be careful not to spill any coolant that may be left in the heater core.
7. Inspect the heater core for damage. If it is damaged, it will need to be replaced.
8. If the heater core is not reusable, install a new heater core by reversing the removal steps.
