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make sure your radiator is clean and no problems first, otherwise you will be throwing away $250 for the new heater core. Pontiacs are notorious "GM's" for having a plastic intake manifold gasket that leaks, which then mixes oil with the radiator fluid and produces this nifty orange rusty looking sludge, which then proceeds to clog your heater core -- so make sure the rest of your system works before trying to replace your heater core. www.autozone.com has free online car manuals that will help with the replacement location, hoses etc of the heater core

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16y ago

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