Where is the heater core on a 1994 Cadillac eldorado?

The heater core in a 1994 Cadillac Eldorado is located deep inside the dashboard, behind the instrument panel. It's not easily accessible and requires significant disassembly to reach. You'll likely need to remove parts of the dashboard to get to it. This is a major job best left to a qualified mechanic unless you have extensive automotive experience.