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How do you remove a heater core from 1992 gmc 3500 vandura?

To remove the heater core from a 1992 GMC 3500 Vandura, follow these steps:

1. Disconnect the negative battery cable to de-energize the electrical system.

2. Remove the heater hoses from the heater core.

3. Remove the bolts holding the heater core to the HVAC housing.

4. Remove the heater core from the HVAC housing.

5. Clean the HVAC housing and install a new heater core.

6. Tighten the bolts holding the heater core in place.

7. Reconnect the heater hoses.

8. Reconnect the negative battery cable.

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