how to replace heater core on a 2004 grand prix

Asked by defosto Aug 29, 2014 at 02:32 PM about the 2004 Pontiac Grand Prix GT2

Question type: Maintenance & Repair

There is coolant leaking inside the car coming from the area of the heater core.

1 Answer
44,805

jamnblues answered 9 years ago

you wanna do this yourself? what a chore- whole dash may have to come out- it might just be the heater valve- check it to see where it's leaking before you start tearing everything apart- I hate doing heater cores-

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